- Linux find process by name
- Procedure to find process by name on Linux
- Linux find process by name using pgrep command
- How to use ‘ps aux | grep command’
- Using pidof command to grab PIDs for any named program on Linux
- A note about top/htop command
- See also
- Getting more help
- Изучаем процессы в Linux
- Содержание
- Введение
- Атрибуты процесса
- Жизненный цикл процесса
- Рождение процесса
- Состояние «готов»
- Состояние «выполняется»
- Перерождение в другую программу
- Состояние «ожидает»
- Состояние «остановлен»
- Завершение процесса
- Состояние «зомби»
- Забытье
- Благодарности
- Show All Running Processes in Linux using ps/htop commands
- Linux commands show all running processes
- How to list process with the ps command
- See every process on the Linux system
- How to see every process except those running as root
- See process run by user vivek
- Linux running processes with top command
- How to display a tree of processes
- Print a process tree using ps
- Get info about threads
- Task: Get security info
- How to save process snapshot to a file
- How to lookup process by name
- Say hello to htop and atop
- atop program
- Conclusion
Linux find process by name
Procedure to find process by name on Linux
- Open the terminal application.
- Type the pidof command as follows to find PID for firefox process:
pidof firefox - Or use the ps command along with grep command as follows:
ps aux | grep -i firefox - To look up or signal processes based on name use:
pgrep firefox
Linux find process by name using pgrep command
pgrep command looks through the currently running processes and lists the process IDs which match the selection criteria to screen. All the criteria have to match. For example, will only list the processes called sshd AND owned by root user:
$ pgrep -u root sshd
Just look up pid for firefox process:
$ pgrep firefox
How to use ‘ps aux | grep command’
ps command shows information about a selection of the active processes:
$ ps aux
$ ps aux | grep -i ‘search-term’
$ ps aux | grep ‘firefox’
$ ps aux | grep ‘sshd’
OR use the following syntax instead of using egrep command in pipes:
$ ps -fC firefox
$ ps -fC chrome
The -C option asks ps command to select PIDs by command name.
- No ads and tracking
- In-depth guides for developers and sysadmins at Opensourceflare✨
- Join my Patreon to support independent content creators and start reading latest guides:
- How to set up Redis sentinel cluster on Ubuntu or Debian Linux
- How To Set Up SSH Keys With YubiKey as two-factor authentication (U2F/FIDO2)
- How to set up Mariadb Galera cluster on Ubuntu or Debian Linux
- A podman tutorial for beginners – part I (run Linux containers without Docker and in daemonless mode)
- How to protect Linux against rogue USB devices using USBGuard
Join Patreon ➔
Using pidof command to grab PIDs for any named program on Linux
The pidof command finds the process id’s (pids) of the named programs such as sshd, firefox and more. For example:
$ pidof sshd
$ pidof firefox
Sample outputs:
A note about top/htop command
To display Linux processes use top command or htop command:
$ top
OR
$ htop
See also
Getting more help
Read the man pages for the following command using man command:
$ man pgrep
$ man pidof
$ man ps
🐧 Get the latest tutorials on Linux, Open Source & DevOps via
Источник
Изучаем процессы в Linux
В этой статье я хотел бы рассказать о том, какой жизненный путь проходят процессы в семействе ОС Linux. В теории и на примерах я рассмотрю как процессы рождаются и умирают, немного расскажу о механике системных вызовов и сигналов.
Данная статья в большей мере рассчитана на новичков в системном программировании и тех, кто просто хочет узнать немного больше о том, как работают процессы в Linux.
Всё написанное ниже справедливо к Debian Linux с ядром 4.15.0.
Содержание
Введение
Системное программное обеспечение взаимодействует с ядром системы посредством специальных функций — системных вызовов. В редких случаях существует альтернативный API, например, procfs или sysfs, выполненные в виде виртуальных файловых систем.
Атрибуты процесса
Процесс в ядре представляется просто как структура с множеством полей (определение структуры можно прочитать здесь).
Но так как статья посвящена системному программированию, а не разработке ядра, то несколько абстрагируемся и просто акцентируем внимание на важных для нас полях процесса:
- Идентификатор процесса (pid)
- Открытые файловые дескрипторы (fd)
- Обработчики сигналов (signal handler)
- Текущий рабочий каталог (cwd)
- Переменные окружения (environ)
- Код возврата
Жизненный цикл процесса
Рождение процесса
Только один процесс в системе рождается особенным способом — init — он порождается непосредственно ядром. Все остальные процессы появляются путём дублирования текущего процесса с помощью системного вызова fork(2) . После выполнения fork(2) получаем два практически идентичных процесса за исключением следующих пунктов:
- fork(2) возвращает родителю PID ребёнка, ребёнку возвращается 0;
- У ребёнка меняется PPID (Parent Process Id) на PID родителя.
После выполнения fork(2) все ресурсы дочернего процесса — это копия ресурсов родителя. Копировать процесс со всеми выделенными страницами памяти — дело дорогое, поэтому в ядре Linux используется технология Copy-On-Write.
Все страницы памяти родителя помечаются как read-only и становятся доступны и родителю, и ребёнку. Как только один из процессов изменяет данные на определённой странице, эта страница не изменяется, а копируется и изменяется уже копия. Оригинал при этом «отвязывается» от данного процесса. Как только read-only оригинал остаётся «привязанным» к одному процессу, странице вновь назначается статус read-write.
Состояние «готов»
Сразу после выполнения fork(2) переходит в состояние «готов».
Фактически, процесс стоит в очереди и ждёт, когда планировщик (scheduler) в ядре даст процессу выполняться на процессоре.
Состояние «выполняется»
Как только планировщик поставил процесс на выполнение, началось состояние «выполняется». Процесс может выполняться весь предложенный промежуток (квант) времени, а может уступить место другим процессам, воспользовавшись системным вывозом sched_yield .
Перерождение в другую программу
В некоторых программах реализована логика, в которой родительский процесс создает дочерний для решения какой-либо задачи. Ребёнок в данном случае решает какую-то конкретную проблему, а родитель лишь делегирует своим детям задачи. Например, веб-сервер при входящем подключении создаёт ребёнка и передаёт обработку подключения ему.
Однако, если нужно запустить другую программу, то необходимо прибегнуть к системному вызову execve(2) :
или библиотечным вызовам execl(3), execlp(3), execle(3), execv(3), execvp(3), execvpe(3) :
Все из перечисленных вызовов выполняют программу, путь до которой указан в первом аргументе. В случае успеха управление передаётся загруженной программе и в исходную уже не возвращается. При этом у загруженной программы остаются все поля структуры процесса, кроме файловых дескрипторов, помеченных как O_CLOEXEC , они закроются.
Как не путаться во всех этих вызовах и выбирать нужный? Достаточно постичь логику именования:
- Все вызовы начинаются с exec
- Пятая буква определяет вид передачи аргументов:
- l обозначает list, все параметры передаются как arg1, arg2, . NULL
- v обозначает vector, все параметры передаются в нуль-терминированном массиве;
- Далее может следовать буква p, которая обозначает path. Если аргумент file начинается с символа, отличного от «/», то указанный file ищется в каталогах, перечисленных в переменной окружения PATH
- Последней может быть буква e, обозначающая environ. В таких вызовах последним аргументом идёт нуль-терминированный массив нуль-терминированных строк вида key=value — переменные окружения, которые будут переданы новой программе.
Семейство вызовов exec* позволяет запускать скрипты с правами на исполнение и начинающиеся с последовательности шебанг (#!).
Есть соглашение, которое подразумевает, что argv[0] совпадает с нулевым аргументов для функций семейства exec*. Однако, это можно нарушить.
Любопытный читатель может заметить, что в сигнатуре функции int main(int argc, char* argv[]) есть число — количество аргументов, но в семействе функций exec* ничего такого не передаётся. Почему? Потому что при запуске программы управление передаётся не сразу в main. Перед этим выполняются некоторые действия, определённые glibc, в том числе подсчёт argc.
Состояние «ожидает»
Некоторые системные вызовы могут выполняться долго, например, ввод-вывод. В таких случаях процесс переходит в состояние «ожидает». Как только системный вызов будет выполнен, ядро переведёт процесс в состояние «готов».
В Linux так же существует состояние «ожидает», в котором процесс не реагирует на сигналы прерывания. В этом состоянии процесс становится «неубиваемым», а все пришедшие сигналы встают в очередь до тех пор, пока процесс не выйдет из этого состояния.
Ядро само выбирает, в какое из состояний перевести процесс. Чаще всего в состояние «ожидает (без прерываний)» попадают процессы, которые запрашивают ввод-вывод. Особенно заметно это при использовании удалённого диска (NFS) с не очень быстрым интернетом.
Состояние «остановлен»
В любой момент можно приостановить выполнение процесса, отправив ему сигнал SIGSTOP. Процесс перейдёт в состояние «остановлен» и будет находиться там до тех пор, пока ему не придёт сигнал продолжать работу (SIGCONT) или умереть (SIGKILL). Остальные сигналы будут поставлены в очередь.
Завершение процесса
Ни одна программа не умеет завершаться сама. Они могут лишь попросить систему об этом с помощью системного вызова _exit или быть завершенными системой из-за ошибки. Даже когда возвращаешь число из main() , всё равно неявно вызывается _exit .
Хотя аргумент системного вызова принимает значение типа int, в качестве кода возврата берется лишь младший байт числа.
Состояние «зомби»
Сразу после того, как процесс завершился (неважно, корректно или нет), ядро записывает информацию о том, как завершился процесс и переводит его в состояние «зомби». Иными словами, зомби — это завершившийся процесс, но память о нём всё ещё хранится в ядре.
Более того, это второе состояние, в котором процесс может смело игнорировать сигнал SIGKILL, ведь что мертво не может умереть ещё раз.
Забытье
Код возврата и причина завершения процесса всё ещё хранится в ядре и её нужно оттуда забрать. Для этого можно воспользоваться соответствующими системными вызовами:
Вся информация о завершении процесса влезает в тип данных int. Для получения кода возврата и причины завершения программы используются макросы, описанные в man-странице waitpid(2) .
Передача argv[0] как NULL приводит к падению.
Бывают случаи, при которых родитель завершается раньше, чем ребёнок. В таких случаях родителем ребёнка станет init и он применит вызов wait(2) , когда придёт время.
После того, как родитель забрал информацию о смерти ребёнка, ядро стирает всю информацию о ребёнке, чтобы на его место вскоре пришёл другой процесс.
Благодарности
Спасибо Саше «Al» за редактуру и помощь в оформлении;
Спасибо Саше «Reisse» за понятные ответы на сложные вопросы.
Они стойко перенесли напавшее на меня вдохновение и напавший на них шквал моих вопросов.
Источник
Show All Running Processes in Linux using ps/htop commands
H ow do I see all running process in Linux operating systems using command line or GUI options? How can I show all running Processes in Linux operating system?
Introduction: A process is nothing but tasks within the Linux operating system. A process named httpd used to display web pages. Another process named mysqld provides database service. You need to use the ps command. It provides information about the currently running processes, including their process identification numbers (PIDs). Both Linux and UNIX support the ps command to display information about all running process. The ps command gives a snapshot of the current processes. If you want a repetitive update of this status, use top, atop, and htop command as described below.
Tutorial details | |
---|---|
Difficulty level | Easy |
Root privileges | Yes |
Requirements | Linux terminal with ps/top/htop utilities |
Est. reading time | 4 minutes |
Linux commands show all running processes
Apart from ps command, you can also use the following commands to display info about processes on Linux operating systems:
- top command : Display and update sorted information about Linux processes.
- atop command : Advanced System & Process Monitor for Linux.
- htop command : Interactive process viewer in Linux.
- pgrep command : Look up or signal processes based on name and other attributes.
- pstree command : Display a tree of processes.
How to list process with the ps command
Type the following ps command to display all running process:
# ps -aux | less
OR
# ps aux | less
Where,
- A : Select all processes
- u : Select all processes on a terminal, including those of other users
- x : Select processes without controlling ttys
See every process on the Linux system
Either pass -A or -e option to show all processes on your server/workstation powered by Linux:
# ps -A
# ps -e
How to see every process except those running as root
To negates the selection pass the -N or —deselect option to the ps command:
# ps -U root -u root -N
OR
# ps -U root -u root —deselect
See process run by user vivek
Select by process by effective user ID (EUID) or name by passing username such as vivek:
# ps -u vivek
- No ads and tracking
- In-depth guides for developers and sysadmins at Opensourceflare✨
- Join my Patreon to support independent content creators and start reading latest guides:
- How to set up Redis sentinel cluster on Ubuntu or Debian Linux
- How To Set Up SSH Keys With YubiKey as two-factor authentication (U2F/FIDO2)
- How to set up Mariadb Galera cluster on Ubuntu or Debian Linux
- A podman tutorial for beginners – part I (run Linux containers without Docker and in daemonless mode)
- How to protect Linux against rogue USB devices using USBGuard
Join Patreon ➔
Linux running processes with top command
The top program provides a dynamic real-time view of a running system. Type the top at command prompt:
# top
Sample outputs:
Fig.01: top command: Display Linux Tasks
How to display a tree of processes
The pstree command shows running processes as a tree. The tree is rooted at either pid or init if pid is omitted. If a user name is specified, all process trees rooted at processes owned by that user are shown.
$ pstree
Sample outputs:
Fig.02: pstree – Display a tree of processes
Print a process tree using ps
# ps -ejH
# ps axjf
Sample outputs:
Manage processes from the Linux terminal
Get info about threads
Type the following command:
# ps -eLf
# ps axms
Task: Get security info
Type the following command:
# ps -eo euser,ruser,suser,fuser,f,comm,label
# ps axZ
# ps -eM
How to save process snapshot to a file
Type the following command:
# top -b -n1 > /tmp/process.log
Or you can email result to yourself:
# top -b -n1 | mail -s ‘Process snapshot’ you@example.com
How to lookup process by name
Use pgrep command command. It looks through the currently running processes and lists the process IDs which matches the selection criteria to screen. For example, display firefox process id:
$ pgrep firefox
Sample outputs:
Following command will list the process called sshd which is owned by a user called root:
$ pgrep -u root sshd
Say hello to htop and atop
htop is interactive process viewer just like top, but allows to scroll the list vertically and horizontally to see all processes and their full command lines. Tasks related to processes (killing, renicing) can be done without entering their PIDs. To install htop on a Debian/Ubuntu Linux, type the following apt-get command/apt command:
# apt-get install htop
or use the yum command to install htop on a CentOS/RHEL:
# yum install htop
Now type the htop command at the shell prompt:
$ htop
Sample outputs:
Fig.03: htop in action (click to enlarge)
atop program
The program atop is an interactive monitor to view the load on a Linux system. It shows the occupation of the most critical hardware resources (from a performance point of view) on system level, i.e. cpu, memory, disk and network. It also shows which processes are responsible for the indicated load with respect to cpu- and memory load on process level; disk- and network load is only shown per process if a kernel patch has been installed. Type the following command to start atop:
# atop
Sample outputs:
Fig.04: Atop Command in Action (click to enlarge)
See also:
Conclusion
Linux processes carry out various tasks/jobs within the Linux distribution. Since Linux is a multiprocessing operating system, one can run multiple tasks in the background. Hence it is essential to know how to show all running processes in Linux.
🐧 Get the latest tutorials on Linux, Open Source & DevOps via
Category | List of Unix and Linux commands |
---|---|
Documentation | help • mandb • man • pinfo |
Disk space analyzers | df • duf • ncdu • pydf |
File Management | cat • cp • less • mkdir • more • tree |
Firewall | Alpine Awall • CentOS 8 • OpenSUSE • RHEL 8 • Ubuntu 16.04 • Ubuntu 18.04 • Ubuntu 20.04 |
Linux Desktop Apps | Skype • Spotify • VLC 3 |
Modern utilities | bat • exa |
Network Utilities | NetHogs • dig • host • ip • nmap |
OpenVPN | CentOS 7 • CentOS 8 • Debian 10 • Debian 8/9 • Ubuntu 18.04 • Ubuntu 20.04 |
Package Manager | apk • apt |
Processes Management | bg • chroot • cron • disown • fg • glances • gtop • jobs • killall • kill • pidof • pstree • pwdx • time • vtop |
Searching | ag • grep • whereis • which |
Shell builtins | compgen • echo • printf |
Text processing | cut • rev |
User Information | groups • id • lastcomm • last • lid/libuser-lid • logname • members • users • whoami • who • w |
WireGuard VPN | Alpine • CentOS 8 • Debian 10 • Firewall • Ubuntu 20.04 |
Comments on this entry are closed.
i hope you dont mind, i have borrowed your image showing PS for my assigment, i have have referenced this site and the date
been tinkering with linux for 2 years, still have to reference some basic commands. If I had a penny for how many times I’ve gone something along the lines of “urh, how do I merge folders with cp again” *google, spots cyberciti* , they’ll probably have some good examples..
No offense, but this is akin to posting instructions on how to walk.
You are a an elitest jerk. Interesting that for someone who believes he already knows everything, you are entirely ignorant of this fact. It is likely that no one was impressed by your comment except yourself.
Don’t worry, he wrote his original lame comment back in 08. He’s probably less ignorant now.
The guy is an idot
‘last updated at JULY 6, 2012’ or may be in 2008 it was! Btw – I have to still meet some one who was born walking.
You guys are great examples of why I no longer prefer to live in the Linux / Eunuchs world. Wow.
You will find this relevant.
Nice try ******. People brand new to Linux are actually learning how to walk again, and this is important information.
@saurabh – I’m glad you think this is like posting instructions on how to walk. I’m also glad that you are such a naturally gifted user that you knew this without ever having to look up how to do this. Some of us have just started using Linux and guess what it is small little tid bits like this that help.
Thanks a lot for the info. It proved really useful. Sometimes it helps when somebody tells you how to walk…
It’s fantastic to know that a great community is behind it.
can someone tell me how to create a script that list all processes that are taking more than 10% of cpu time?
btw i am a noob lol
@saurabh no offense, are you an Indian? If so, that explains and if not, set up your own site and don’t post anything on it loser.
what the hell do u know about indian? shut the hell up and do some linux home work kiddo..
@akinhowtowalk: i’m so glad you’ve demonstrated so much more maturity than saurabh through your sweeping generalization.
The guy who wrote the article is also indian. His name is Vivek
Lol @ akinhowtowalk. Well said!
Hahah indians are the most dumb nation and yes smelly tooo 🙂
shut up man…mind ur tounge..wt u knw abt indians.
How dare you say a thing about our beautiful country, u BMF?
amazing how something like a simple request for a bit of help on a topic can lead to racist banter….
keep it simple, keep it clean, don’t be judgmental of Indians or any other race, and STAY ON the TOPIC of the THREAD!!
// and yes, everyone needs to learn how to walk, and how to do the basics, before they can move to more advanced things…..
@pyrolighting VERY WELL SAID
Well said, thank you.
i want to know how can i run command that show me which script is currently running and by which user
Hi Everybody, I got an cleared information in this site. But I want to know that what are the process currently active in my shell. If any body know, please email me @ allimut@gmail.com
Yo thanks heaps for this info! It’s just what I needed! *favourited*
akinhowtowalk good answer for the loser 😀
I’ve been walking the Linux path for a long time and it’s nice to see this type of command posted.
To see what is running and consuming resources you could use (exactly as it is shown):
ps -e -o pcpu,cpu,nice,state,cputime,args –sort pcpu | sed “/^ 0.0 /d”
which is nice to enter into the .bashrc in your home directory as an alias. Like this (on the last line after every other entry):
alias hog=’ps -e -o pcpu,cpu,nice,state,cputime,args –sort pcpu | sed “/^ 0.0 /d”‘
so the next time I log in I can just type hog at the command line and see all process running and consuming resources, sorted.
In the path of Linux, if you want to start running without knowing how to walk, what will happen? Begginers know that they can get to the top, but step by step. Otherwise, they’ll fall. And let’s stop the metaphores xD
Any one help to find command history with date & time.
$ HISTTIMEFORMAT=”%d/%m/%y %T ”
OR
$ echo ‘export HISTTIMEFORMAT=”%d/%m/%y %T “‘ >>
/.bash_profile
Where,
%d – Day
%m – Month
%y – Year
%T – Time
To see history type
$ history
Thank you. found it very useful 🙂
Lol@akinhowtowalk well said 🙂
Regards,
ILoveTakingHelp 😛
Thanks for posting this ! You’ve helped me a lot !
thanks for that. i needed this to set something running and set-up on a linux server. but i needed to kill it first so :)thanks.
i find this site really usefull and find the stuff what i was looking for…
and saurabh’s comment was not justified…
but what was ur comment on being an indian… i really didnt understood that…and y..
that explains wat.
Thanks for the htop info, really useful tool.
thx.
it’s nice
thx a lot for this tool
Hey, can someone please give me instructions on how to walk?
1. Stand up with feet together.
2. Put one foot forward of the other foot.
3. Put other foot in front of the one you just moved.
Repeat #s 2 and 3 until you have reached your destination.
I tried, but got some error messages.
Warning: proceeding can cause stability issues in the system
Warning: bad pathway
Process KNEE broken, terminating.
Since I learnt how to use ps I forgot how to walk. Anyone know the neccessary commands?
Cool instruction, i dont know there were commands that named “TOP”
and…… i forget how to walk =( *(googling how to walk)
saurabh, were you born walking? Didn’t think so.
saurabh takes baby steps as he is always half drunk
that is all you may go on with your sad life.
saurabh:
how do you expect newbies to learn if people don’t post stuff like this?
This command is usefull when you whant to know what process is responsible for each open port.
I’m amazed that more then one and a half year after a person has posted a single message,
Chongopants 09.24.09 at 7:17 pm
saurabh, stfu..
that is all you may go on with your sad life.
something like this is still said
very helpful page!! Thx a lot to whoever wrote it
thankz very much master ..
its a good post .. and very usefull for me 🙂
htop 😀 i was find for more times
Don’t generalize, not all Indians are like saurabh. Grow up. Boasting exists irrespective of race.
@akinhowtowalk – I am really offended by your remarks on a specific nation. I dont expects mature guys to make such kind of remark. really very disappointing (i can also go dirty in reaction but i dont prefer to). Make sure you comment on individual and not on any group/society/nation.
@Saurabh – If you are an expert then i will appreciate you posting advance topics on linux and punlish the URL on this forum. If you cant do that much for community then you dont have any rights to comments on someones contribution.
nice reply.
well put,
and well explained to both of our friends concerned.
And btw, This was an Awesome post! 🙂
i probably think saurab never came back to this page after he commented on it. You guys were so foolish enough to comment back . lol
I was just looking for something that can give me the green signal so that i can quit all running processes before i shut my computer…. And i ended up here. Looks i i still cant get what i should type to see only those processes that are running currently. Some thing like the task manager in windows . Any help with that ?
Please go ahead and reboot
Hi
I wanted to display only PID and Process name in MAC OS. “ps” doesn’t display process name rather command only. Can Anyone help.
Thanx & regards in advance
Noufal
I am a complete newbie to linux and I *am* learning to walk with it,, so thanks for the article 🙂
akinhowtowalk probably said that regarding Indians coz he knows that Indians are smarter .. atleast they make our Business run smoothly ..cheers 🙂
Thanks. In an introduction to UNIX class, this helped out and quicker than looking it up in my textbook.
Very userful.. Thanks a lot….
Nice….. got geat help…. Thanks…
Great Site.
Well written articles.
And Just to keep it going…
Why walk when you can run with Linux!!
I am using Fedora 14 in my laptop. I installed an .rpm file , but i don’t know how to run that software. please help me. I am new for Linux.
Well I think the first best question that needs to be asked is what software have you installed?
I installed an CFD software named as ‘ZNTutor-CFD-2.1.0-0.i386.rpm’. the installation is successful.
As this is a commercial program I wont be installing it to have a look. I would suggest asking the question in a forum more related / dedicated to this product. Also have a look to find where the package was installed and read the manual that was supplied.
If this manual doesn’t even cover the simple processes I would be a little worried about it considering the subject matter involved.
Ok I will try to get that..
Thanks very useful
Very useful keep going on!
Very laconic and very good article
Thanks
Thanks a lot Vivek for taking the time to post the help for these commands in a detailed manner!
Thanks for the help, I found the problem right off!
Very useful, thanks!
i’m running one process in linux server with the common user that is using by 20 people from different windows machine, i want to know who executed the command at what time in the linux server? is there any file/log location that having all the commands that executed in the server.
Thanks in adv,
Kebiraj
very useful commands, thanks to OP.
Thanks to everyone else for the amusing read lol
Thanks a lot for this articles. I searched for one solution and found several in one page. God bless u Vivek for making some of us who are new and started to “walk” with Linux, and for those unjustified comments..well just ignored them.
Thanks, Well explained.
Great article. Thank you very much. And one thing to remember for all linuxholics, “Linux is for human being’s goodness” , sharing is the fuel that runs the community. Share everything even if you think it is less important, because there are many people who are looking for a point to startup. Knowing Linux means nothing if you don’t know the great philosophy behind it.
thanks,
Many thanks for posting those instructions.
Great work, very clear instruction. I’ve been using Linux for 2 years and still believe there’s a lot for me to learn or I should say to know. Pages like this makes a huge difference for learners who try and never give up. I really appreciate the time and efforts of the author, keep it up my friend. As for the guy with “walk” comment I’d like to say you don’t have to read what you don’t like, at least give this guy the credit for the time and effort for putting this together for the world and, go ahead and show the world what you’re ca[able of.
@saurobh: Successful troll is successful. lol
Really helpful post, thanks 🙂
Can any one tell me how can i list all the processes launched from a directory and sort them to find the process which is consuming more memory than others.
We are using AIX.
Please help me.
thanks so much dude. it really helps me, i’m new in linux
good post. quite useful.
hello,i wonder,how to know the details of user who run specific processes?
bkmraaster on November 6, 2011 Oh well why not give it a shot, there’s nothing to lose, so I guess there’s everything to win! And cmon who doesn’t like sony products!
Thanks for your article, help me a lot!
This site’s one of the best resources for nix noobs … much prec
i have run vacum but still the problem not yet solved
[root@onms-dr mysql]# /etc/init.d/opennms start
Starting OpenNMS: org.postgresql.util.PSQLException: FATAL: database is not accepting commands to avoid wraparound data loss in database “postgres”
OpenNMS runs better if you start up the database first.
[FAILED]
you can also view all the running process by running the below command
Nice site… for noobs 🙂
I’ve just boomarked the website, it’s useful for my jobs.
how can I print the virtual pages allocated to the currently running processes on my system and also the page faults associated with them?
Yip years later this is still a useful page. Didn’t know about htop, quite like it.
I thought I saw a comment asking how to show processes for a user.
top -u root
or
htop -u root
great stuff and that htop thing was really useful
Nice tut, i love htop, it’s very good 🙂
Thanks for the contribution!
P.S. Don’t feed the trolls.
hello everyone will u pls tell me use of sort -o cmd
Thank you much. The information might be dated, but still very relevant. Good Stuff.
Great article thanks to author for this nice help.
To all those above blaming Indian in any mean, just google our statistics over technology, you will see that you people are learning from Indian.So dont angry me again
Lots of racism in America (and elsewhere), sadly. Chump still getting almost half the poll; his ratings have dipped a little after a series of spectacular gaffes and public GOP infighting, but that probably mostly just reflects the natural reticence of some voters to tell opinion pollsters to their face that they’re a racist, and not an actual opinion shift. (In the UK such opinion polling reticence at the clipboard-face produced the “shy Tory” and “shy Brexiteer” phenomena in 1992 and 2016, which badly overestimated Labour and Remain support respectively, and predicted the opposite results to actual). Rednecks seem to prevail in America, and in my estimation a Chump presidency remains a very real risk.
The Indian space programme is well-resourced and impressively ambitious. By way of contrast, the British space programme is run on a shoestring from a garden shed in Leicester. Its crowning achievement was the BEAGLE2, which was made from old Sqezy washing-up liquid bottles and sticky-backed plastic. BEAGLE2’s signal lasted for about 20 seconds before fading away with a whimper, leading Prof. Colin Pillinger to lament: “If only Britain had applied to India for overseas aid, we could have afforded a second reel of sticky-backed plastic to hold the undercarriage together and BEAGLE2 would still be transmitting”.
To show all active services, both upstart and chkconfig, try:
( chkconfig –list | grep :on | sed ‘s/ .*//’ ; initctl list | grep process | sed ‘s/ .*//’ ) | sort
How to check that specific process is working fine or not for eg. HeartBeat manager, IKEN process, FSM, LSTP etc etc.
Regards
Chaitanya Mahamana
9871351236
which command shows who is currently on the system and their processes?
Источник