Linux count string in file

How to Count lines in a file in UNIX/Linux

Question: I have a file on my Linux system having a lot of lines. How do I count the total number of lines in the file?

Using “wc -l”

There are several ways to count lines in a file. But one of the easiest and widely used way is to use “wc -l”. The wc utility displays the number of lines, words, and bytes contained in each input file, or standard input (if no file is specified) to the standard output.

So consider the file shown below:

1. The “wc -l” command when run on this file, outputs the line count along with the filename.

2. To omit the filename from the result, use:

3. You can always provide the command output to the wc command using pipe. For example:

You can have any command here instead of cat. Output from any command can be piped to wc command to count the lines in the output.

Using awk

If you must want to use awk to find the line count, use the below awk command:

Using sed

Use the below sed command syntax to find line count using GNU sed:

Using grep

Our good old friend «grep» can also be used to count the number of lines in a file. These examples are just to let you know that there are multiple ways to count the lines without using «wc -l». But if asked I will always use «wc -l» instead of these options as it is way too easy to remember.

With GNU grep, you can use the below grep syntax:

Here is another version of grep command to find line count.

Some more commands

Along with the above commands, its good to know some rarely used commands to find the line count in a file.

1. Use the nl command (line numbering filter) to get each line numbered. The syntax for the command is:

Not so direct way to get line count. But you can use awk or sed to get the count from last line. For example:

2. You can also use vi and vim with the command «:set number» to set the number on each line as shown below. If the file is very big, you can use «Shift+G» to go to the last line and get the line count.

3. Use the cat command with -n switch to get each line numbered. Again, here you can get the line count from the last line.

4. You can also use perl one lines to find line count:

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How to return string count in multiple files in Linux

I have multiple xml files and I want to count some string in it. How to return string count with files names in Linux? The string I want to count InvoıceNo: Result will be;

5 Answers 5

Following awk may help you in same, since you haven’t shown any sample Inputs so not tested it.

Use grep -c to get the count of matching lines

First the test files:

The GNU awk using gsub for counting:

A little shell skript will do want you want

Put the code in a file (e.g. counter.sh) and run it like this:

counter.sh text.xml text1.xml text2.xml

You can probably use the following code

Not the answer you’re looking for? Browse other questions tagged linux string bash shell count or ask your own question.

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How to count lines in a document?

I have lines like these, and I want to know how many lines I actually have.

Is there a way to count them all using linux commands?

27 Answers 27

This will output the number of lines in :

Or, to omit the from the result use wc -l :

You can also pipe data to wc as well:

To count all lines use:

To filter and count only lines with pattern use:

Or use -v to invert match:

See the grep man page to take a look at the -e,-i and -x args.

there are many ways. using wc is one.

sed -n ‘$=’ file (GNU sed)

The tool wc is the «word counter» in UNIX and UNIX-like operating systems, but you can also use it to count lines in a file by adding the -l option.

wc -l foo will count the number of lines in foo . You can also pipe output from a program like this: ls -l | wc -l , which will tell you how many files are in the current directory (plus one).

If you want to check the total line of all the files in a directory ,you can use find and wc:

wc -l does not count lines.

Yes, this answer may be a bit late to the party, but I haven’t found anyone document a more robust solution in the answers yet.

Contrary to popular belief, POSIX does not require files to end with a newline character at all. Yes, the definition of a POSIX 3.206 Line is as follows:

A sequence of zero or more non- characters plus a terminating character.

However, what many people are not aware of is that POSIX also defines POSIX 3.195 Incomplete Line as:

A sequence of one or more non- characters at the end of the file.

Hence, files without a trailing LF are perfectly POSIX-compliant.

If you choose not to support both EOF types, your program is not POSIX-compliant.

As an example, let’s have look at the following file.

No matter the EOF, I’m sure you would agree that there are two lines. You figured that out by looking at how many lines have been started, not by looking at how many lines have been terminated. In other words, as per POSIX, these two files both have the same amount of lines:

The man page is relatively clear about wc counting newlines, with a newline just being a 0x0a character:

Hence, wc doesn’t even attempt to count what you might call a «line». Using wc to count lines can very well lead to miscounts, depending on the EOF of your input file.

POSIX-compliant solution

You can use grep to count lines just as in the example above. This solution is both more robust and precise, and it supports all the different flavors of what a line in your file could be:

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How to count occurrences of word in file using shell script in Linux

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In my last article I shared some samples scripts to find and remove duplicate files and directories in Linux or Unix. Now in this article I will share some commands and scripts to count occurrences of word in file with examples.

Script to count occurrences of word in file

We can use the associative arrays of awk to solve this problem in different ways. Words are alphabetic characters, delimited by space or a period. First, we should parse all the words in a given file and then the count of each word needs to be found. Words can be parsed using regex with tools such as sed, awk, or grep.

Sample shell script

Below is a sample shell script which will count occurrences of word in file and print the total count of all the words present in the file.

Next I will create a dummy_file.txt with some content which we will use to count all the words in the file

Now we will run the script along this file. And as you see the script will print the total occurrence of word in file. The script is also able to differentiate between matching words such as counts, count, counting

One liner command

You can also count occurrences of word in file with various one liner commands using grep, sed, tr, python etc. I will show some more examples here:

Using grep command

With egrep we can use different directives to count occurrences of word in file, for example to print the total number of occurrence of word » count » in /tmp/dummy_file.txt

Here ‘\ ‘ makes sure that we only match the exact string, or else if we just use the word » count » then check the output. \ asserts the start of a word and \> asserts the end of a word

It is because it is trying to capture » counts » and » counting » also from the file

Using tr command

Similar to grep we can use translate command to count occurrences of word in file

You can also use sed and other tools to list the word count from a file in Linux or Unix.

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2 thoughts on “How to count occurrences of word in file using shell script in Linux”

How can i print the no of words containing vowels in a file?

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Команда Wc в Linux (количество строк, слов и символов)

Wc Command in Linux (Count Number of Lines, Words, and Characters)

В этом руководстве мы покажем вам, как использовать wc команду, на простых и практичных примерах.

В Linux и Unix-подобных операционных системах wc команда позволяет подсчитать количество строк, слов, символов и байтов каждого заданного файла или стандартного ввода и распечатать результат.

Как использовать wc команду

Синтаксис wc команды следующий:

В простейшей форме, когда она используется без каких-либо параметров, wc команда напечатает четыре столбца, число строк, слова, количество байтов и имя файла для каждого файла, переданного в качестве аргумента. При использовании стандартного ввода четвертый столбец (имя файла) не отображается.

Например, следующая команда отобразит информацию о виртуальном файле /proc/cpuinfo :

Вывод будет выглядеть примерно так:

• 448 — количество строк.
• 3632 — количество слов.
• 22226 — это количество символов.

При использовании стандартного ввода имя файла не отображается:

Чтобы отобразить информацию о нескольких файлах, передайте имена файлов в качестве аргументов через пробел:

Команда предоставит вам информацию о каждом файле и строку, включая общую статистику:

Параметры ниже позволяют вам выбрать, какие счетчики будут напечатаны.

• -l , —lines — Вывести количество строк.
• -w , —words — Вывести количество слов.
• -m , —chars — Вывести количество символов.
• -c , —bytes — Вывести количество байтов.
• -L , —max-line-length — Вывести длину самой длинной строки.

При использовании нескольких опций счетчик печатается в следующем порядке: новая строка, слова, символы, байты, максимальная длина строки.

Например, для отображения только того количества слов, которое вы бы использовали:

Вот еще один пример, который напечатает количество строк и длину самой длинной строки.

—files0-from=F Опция позволяет wc читать входные данные из файлов , указанных NUL-прерванных имен в файле F . Если F есть, — то читать имена из стандартного ввода. Например, вы можете искать файлы с помощью find команды и предоставлять эти файлы в качестве входных данных для wc :

Вывод покажет количество строк для всех файлов в /etc каталоге, имена которых начинаются с «host»:

Подсчитать количество строк

Команда wc в основном используется с -l опцией подсчета только количества строк в текстовом файле. Например, чтобы подсчитать количество строк в /etc/passwd файле, введите:

Первый столбец — это количество строк, а второй — имя файла:

Подсчитайте количество слов

Чтобы подсчитать только количество слов в текстовом файле, используйте wc -w имя файла. В следующем примере подсчитывается количество слов в

Количество слов показано в первом столбце:

Примеры команд Wc

wc команда может быть использована в комбинации с другими командами через трубопровод. Вот несколько примеров.

Подсчет файлов в текущем каталоге

Команда find передает список всех файлов в текущем каталоге с каждым именем файла в одной строке wc команде, которая подсчитывает количество строк и печатает результат:

Подсчитать количество пользователей

В приведенном ниже примере wc используется для подсчета количества строк из выходных данных getent команды.

Вывод

Команда wc обозначает «количество слов» и имеет довольно простой синтаксис. Это позволяет подсчитывать количество строк, слов, байтов и символов в одном или нескольких текстовых файлах.

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