Follow Techotopia on Twitter

On-line Guides
All Guides
eBook Store
iOS / Android
Linux for Beginners
Office Productivity
Linux Installation
Linux Security
Linux Utilities
Linux Virtualization
Linux Kernel
System/Network Admin
Programming
Scripting Languages
Development Tools
Web Development
GUI Toolkits/Desktop
Databases
Mail Systems
openSolaris
Eclipse Documentation
Techotopia.com
Virtuatopia.com

How To Guides
Virtualization
General System Admin
Linux Security
Linux Filesystems
Web Servers
Graphics & Desktop
PC Hardware
Windows
Problem Solutions
Privacy Policy

  




 

 

Next: , Previous: create, Up: Tutorial


2.7 How to List Archives

Frequently, you will find yourself wanting to determine exactly what a particular archive contains. You can use the --list (-t) operation to get the member names as they currently appear in the archive, as well as various attributes of the files at the time they were archived. For example, you can examine the archive collection.tar that you created in the last section with the command,

     $ tar --list --file=collection.tar

The output of tar would then be:

     blues
     folk
     jazz

The archive bfiles.tar would list as follows:

     ./birds
     baboon
     ./box

Be sure to use a --file=archive-name (-f archive-name) option just as with --create (-c) to specify the name of the archive.

If you use the --verbose (-v) option with --list, then tar will print out a listing reminiscent of ‘ls -l’, showing owner, file size, and so forth.

If you had used --verbose (-v) mode, the example above would look like:

     $ tar --list --verbose --file=collection.tar folk
     -rw-r--r-- myself user 62 1990-05-23 10:55 folk

It is important to notice that the output of tar --list --verbose does not necessarily match that produced by tar --create --verbose while creating the archive. It is because GNU tar, unless told explicitly not to do so, removes some directory prefixes from file names before storing them in the archive (See absolute, for more information). In other words, in verbose mode GNU tar shows file names when creating an archive and member names when listing it. Consider this example:

     $ tar cfv archive /etc/mail
     tar: Removing leading `/' from member names
     /etc/mail/
     /etc/mail/sendmail.cf
     /etc/mail/aliases
     $ tar tf archive
     etc/mail/
     etc/mail/sendmail.cf
     etc/mail/aliases

This default behavior can sometimes be inconvenient. You can force GNU tar show member names when creating archive by supplying --show-stored-names option.

--show-stored-names
Print member (as opposed to file) names when creating the archive.

You can specify one or more individual member names as arguments when using ‘list’. In this case, tar will only list the names of members you identify. For example, tar --list --file=afiles.tar apple would only print apple.

Because tar preserves paths, file names must be specified as they appear in the archive (ie., relative to the directory from which the archive was created). Therefore, it is essential when specifying member names to tar that you give the exact member names. For example, tar --list --file=bfiles birds would produce an error message something like ‘tar: birds: Not found in archive’, because there is no member named birds, only one named ./birds. While the names birds and ./birds name the same file, member names are compared using a simplistic name comparison, in which an exact match is necessary. See absolute.

However, tar --list --file=collection.tar folk would respond with folk, because folk is in the archive file collection.tar. If you are not sure of the exact file name, try listing all the files in the archive and searching for the one you expect to find; remember that if you use --list with no file names as arguments, tar will print the names of all the members stored in the specified archive.

 
 
  Published under the terms of the GNU General Public License Design by Interspire