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Full Discussion: Remove a line from a file
Top Forums Shell Programming and Scripting Remove a line from a file Post 302299613 by daikeyang on Friday 20th of March 2009 01:56:02 PM
Old 03-20-2009
Remove a line from a file
Hi ,guys. I have one question:

I want to write a script which removes a line with certain string from a file, for example

The name of the file is: "passwd", the contents of it is below:

*************************
...
brownj2:x:5000:
hynesp:x:5001:
leeb:x:5002
dioxna:x:5003
...

*************************
I want to remove the line with "brownj2" from the file.

Here is my code:
user="brownj2"
sed '/^user:/'d passwd

But, this does not work
Firstly, line with "brownj2" is not removed.
Secondly, I got all the contents in passwd shown up in the terminal, which is not what I want

Can anybody help me with this?

Thank you very much for your time in advance.

-Keyang
 

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LEARN ABOUT DEBIAN

cvsd-passwd

cvsd-passwd(8)						      System Manager's Manual						    cvsd-passwd(8)

NAME

       cvsd-passwd - generate password entries for repositories

SYNOPSIS

       cvsd-passwd REPOS [+|-]NAME...

DESCRIPTION

       cvsd-passwd adds, updates or deletes users from repository passwd files for use with cvsd.

OPTIONS

       REPOS  Specify  the  directory in which the repository is located. This argument can be the top of the repository, the CVSROOT directory or
	      even the passwd file in the CVSROOT directory.

       [+]USER[:SUSER]
	      Add or update the user to the CVSROOT/passwd file.  If the user does not exist a password for the user is  asked	and  the  user	is
	      added for use with cvsd.	If the user already exists a password for is asked and the password field is modified.

	      The :SUSER part can be user to change or set mapping to a system user.  If you do not specify anything, a reasonable default is used
	      based upon your cvsd configuration.  If you don't want to map the user to any specified system user you can specify an  empty  SUSER
	      and use 'USER:'.

       -USER  Remove the user from the CVSROOT/passwd file.

EXAMPLES

       Add an anoncvs user to access the given repository:
	   cvsd-passwd /var/lib/cvsd/myrepos +anoncvs
       If the user already exists, change the password.

       Remove a user from the repository passwd list:
	   cvsd-passwd /var/lib/cvsd/myrepos -foo

       Add a user and specify that cvs should remap this user to the joe system user:
	   cvsd-passwd /var/lib/cvsd/myrepos joecvs:joe
       Note that the user joe should be known in the system passwd file and that cvsd should be run as root or user joe for this to work.

SEE ALSO

       cvsd(8)

AUTHOR

       Arthur de Jong <arthur@arthurdejong.org>.

Version 1.0.24							     Jun 2012							    cvsd-passwd(8)
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