Command to extract files in linux

3 Ways to Extract and Copy Files from ISO Image in Linux

Let’s say you have a large ISO file on your Linux server and you wanted to access, extract or copy one single file from it. How do you do it? Well in Linux there are couple ways do it.

For example, you can use standard mount command to mount an ISO image in read-only mode using the loop device and then copy the files to another directory.

Mount or Extract ISO File in Linux

To do so, you must have an ISO file (I used ubuntu-16.10-server-amd64.iso ISO image) and mount point directory to mount or extract ISO files.

First create an mount point directory, where you will going to mount the image as shown:

Once directory has been created, you can easily mount ubuntu-16.10-server-amd64.iso file and verify its content by running following command.

Mount ISO File in Linux

Now you can go inside the mounted directory (/mnt/iso) and access the files or copy the files to /tmp directory using cp command.

Copy Files From ISO File in Linux

Note: The -r option used to copy directories recursively, if you want you can also monitor progress of copy command.

Extract ISO Content Using 7zip Command

If you don’t want to mount ISO file, you can simply install 7zip, is an open source archive program used to pack or unpack different number of formats including TAR, XZ, GZIP, ZIP, BZIP2, etc..

Once 7zip program has been installed, you can use 7z command to extract ISO file contents.

7zip – Extract ISO File Content in Linux

Note: As compared to Linux mount command, 7zip seems much faster and smart enough to pack or unpack any archive formats.

Extract ISO Content Using isoinfo Command

The isoinfo command is used for directory listings of iso9660 images, but you can also use this program to extract files.

As I said isoinfo program perform directory listing, so first list the content of ISO file.

List ISO Content in Linux

Now you can extract a single file from an ISO image like so:

Note: The redirection is needed as -x option extracts to stdout.

Extract Single File from ISO in Linux

Well, there are many ways to do, if you know any useful command or program to extract or copy files from ISO file do share us via comment section.

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How to Open, Extract and Create RAR Files in Linux

RAR is a most popular tool for creating and extracting compressed archive (.rar) files. When we download an archive file from the web, we required a rar tool to extract them.

RAR is available freely under Windows operating systems to handle compressed files, but unfortunately, rar tool doesn’t pre-installed under Linux systems.

This article explains how to install unrar and rar command-line tools using official binary tar file under Linux systems to open, extract, uncompress or unrar an archive file.

Step 1: How to Install Unrar in Linux

On Debian and Ubuntu based distributions, you can easily install unrar package using the apt-get or apt program as shown.

If you are using Fedora distribution, you can use the dnf command to install it.

If you are using a CentOS / RHEL distribution, you need to download the latest unrar/rar file and install it using following commands.

Step 2: How to Open/Extract a RAR File in Linux

To open/extract a RAR file in current working directory, just use the following command with unrar e option.

To open/extract a RAR file in specific path or destination directory, just use the unrar e option, it will extract all the files in specified destination directory.

To open/extract a RAR file with their original directory structure. just issue below command with unrar x option. It will extract according their folder structure see below output of the command.

Step 3: How to List a RAR File in Linux

To list a files inside a archive file use unrar l option. It will display the list of files with their sizes, date, time and permissions.

Step 4: How to Test a RAR File in Linux

To test an integrity of a archive file, use option unrar t. The below command will perform a complete integrity check for each file and displays the status of the file.

The unrar command is used to extract, list or test archive files only. It has no any option for creating RAR files under Linux. So, here we need to install RAR command-line utility to create archive files.

Step 5: How to Install Rar in Linux

To install RAR command option in Linux, just execute following command.

Sample Output

Step 6: How to Create Rar File in Linux

To create a archive(RAR) file in Linux, run the following command with rar a option. It will create archive file for a tecmint directory.

Step 7: How to Delete files from Archive

To delete a file from a archive file, run the command.

Step 8: How to Recover Archives

To recover or fix a archive file or files, run the command with option rar r.

Step 9: How to Update Archives

To update or add files to existing archive file, use the following command with option rar u.

Now, verify that the file tecmint.sql is added to archive file.

Step 10: How to Set Password to Archives

This is very interesting feature from Rar tool, it allows us to set a password to archive file. To password protect archive file use option rar a -p.

Now verify it by extracting the archive file and see whether it will prompt us to enter password that we have set above.

Step 11: How to Lock Archives

Another interesting lock feature from rar tool, it provides a option to lock a particular archive file from extracting it.

Conclusion

For mor RAR and Unrar options and usage, run the following command it will display a list of options with their description.

We have presented almost all of the options above for rar and unrar commands with their examples. If you feel that we’ve missed anything in this list and you would like us to add, please update us using comment form below.

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How to extract tar.xz files in Linux and unzip all files

H ow do I extract tar.xz files in Linux? Can you tell me command to unzip linux-5.6.13.tar.xz file? How can I uncompressing (or decompressing) all files in the current directory?

The tar command and xz command provides support for extracting and uncompressing tar.xz files and .txz archives under Linux operating systems.

Tutorial details
Difficulty level	Easy
Root privileges	No
Requirements	tar and xz commands on Linux
Est. reading time	6 minutes

How do I extract tar.xz files in Linux?

1. Install xz using the dnf install xz on a CentOS/RHEL/Fedora Linux.
2. Debian/Ubuntu Linux users try apt install xz-utils command.
3. Extract tar.xz using the tar -xf backup.tar.xz command
4. To decompress filename.tar.xz file run: xz -d -v filename.tar.xz

Installation

XZ is a set of open-source software for lossless data compressors, including LZMA and xz formats. These formats are popular among open source developers and projects due to higher compression rates than alternatives tools like gzip and bzip2. The tar command works if xz installed on the system. Hence, we must install it.

Debin/Ubuntu Linux install xz

Use the apt command/apt-get command:
$ sudo apt install xz-utils
Sample outputs:

CentOS/RHEL/Fedora Linux install xz

Open the terminal app and then run NA command/dnf command as follows:
$ sudo dnf install xz
## On an older version of CentOS/RHEL try yum ##
$ sudo yum install xz
From my CentOS 6.x box:

Installing xz on OpenSUSE/SUSE Enterprise Linux

We can use the zypper command to install xz:
$ sudo zypper install xz

OpenSUSE installing xz package for extraction purposes

Examples

Now we install xz. We can now directly use the tar command as follows for extracting a file named linux-5.6.13.tar.xz:
$ tar -xf linux-5.6.13.tar.xz
$ tar -xvf linux-5.6.13.tar.xz
$ tar -Jxvf linux-5.6.13.tar.xz
## extract tar.xz files aka .txz file ##
$ tar —xz -xf archive.txz

Extracting specific files from a tar.xz file

We extract a given file names from a backup.tar.xz file by using the following syntax:
$ tar -xf backup.tar.xz resume.pdf
$ tar -xf backup.tar.xz babys-3rd-cake-day.jpg sales.txt
Sometimes we don’t know file names in advance. Hence, we list the contents of an archive by passing the -t as follows and then unzip tar.xz files:
$ tar -tvf backup.tar.xz
## filter out tar listing option using the grep command/egrep command ##
$ tar -tvf backup.tar.xz | grep file1
$ tar -tvf backup.tar.xz | egrep ‘ file.txt | data.doc | cake.jpg ‘

Want to extract all Perl or Python source code files? Try the following option:
$ tar —wildcards ‘*.py’ -xvf webroot.tar.xz
$ tar —wildcards ‘*.pl’ -xvf centos-7-sysadmin-scripts.txz

Understanding tar command options

• -x : Extract/get/unzip files from an archive.
• -f archive.tar.xz : Use this archive file or device archive for extracting files
• -J OR —xz : Filter the archive through xz command. Hence, we install xz using package manager.
• -v : Verbose. Show progress.
• -t : List file stored inside .tar.xz/.xz archive.
• —wildcards : By default, wildcards don’t work as they treated or processed to by your current shell. Therefore, to extract files, use the —wildcards options. For example, extract all .webp images I would pass —wildcards ‘*.webp’ option to the tar.

How to extract .xz files using the xz command

So far, we learned to use tar for extracting. But, we can use xz command directly for as compressor and decompressor too. Tar internally calls xz itself or using API provided by libs. Let us see some tips and tricks for xz command.

Decompress .tar.xz file

$ xz —decompress filename.tar.xz
$ xz -v -d archives.tar.xz
Decompress file named mysql.sql.xz and replaced by mysql.sql:
$ xz -v -d mysql.sql.xz

Compress tarball as .tar.xz file

Compress a file named mysql.sql and replace it by mysql.sql.xz for saving disk space:
$ xz mysql.sql
The syntax is as follows for compressing per-existing tarball:
$ xz -v -z filename.tar
Alternatively, use the tar command for convenience purposes
$ tar -cv J f file1 file2
$ tar -cv J f /path/to/dir1 ./dir2
$ sudo tar -cv J f /efs/backups/14-05-2020/production-webroot.tar.xz /var/www/
$ sudo tar —xz -cvf /efs/backups/aws-us-west-www-prod-42-etc.txz /etc/

Gif 01. xz in action

Compress from stdin

$ mysqldump nixcraft-blog | xz > nixcraft-blog.sql.xz
Of coruse we can uncompress and send content to stdout for the mysql command too
$ xzcat nixcraft-blog.sql.xz | mysql nixcraft-blog
Let us uncompress tar directory from stdin sent from the nc, enter (assuming that target server-ip protected by VPN else use the ssh command):
$ nc -l -p 4242 | tar -xJvf —
On other side compress directory to stdout and send to the nc, run:
$ tar -cJvz — /var/www/html | nc server-ip-here 4242
Our final example use ssh instead of nc:
$ tar —xz -cf — /path/to/dir | ssh vivek@server1.cyberciti.biz «cat > filename.txz»
See “How To Use tar Command Through Network Over SSH Session” for more info.

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Conclusion

This quick tutorial explained how to extract and unzip popular archive formats such as .tar.xz and .txz under Linux operating systems. Remember, tar command only works if you install the xz command via the package manager. See the xz project home page and docs here.

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