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Full Discussion: How to remove last line of the file
Top Forums Shell Programming and Scripting How to remove last line of the file Post 302566368 by alister on Thursday 20th of October 2011 08:40:29 AM
Old 10-20-2011
Quote:
Originally Posted by ddreggors
or instead of using a temp file and having the added overhead of the cat command...


Code:
sed -i '$d' yourfile

The "-i" flag is for editing the file "in place", meaning it does not print to stdout but changes the file directly.
"--in-place" is a misnomer. sed -i does not change the file directly. It creates a temp file into which it dumps its output and when it's done writing to the temp file it renames it.

Using cat also has the benefit of preserving the original file's inode, permissions, and ownership, all of which can be clobbered when a temp file is used and then renamed with mv.

There are also differences in the permissions required. renaming a temp file to the original file's name only requires write permission on the directory. While using cat to modify the contents of the original file requires write permission on the original file.


Quote:
Originally Posted by vgersh99
This is GNUism - only GNU sed supports '-i'
FreeBSD also supports it (and a -I which doesn't reset the line counter when multiple files are processed). But your point still stands, that the option is not available on most platforms.

Regards,
Alister
 

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LEARN ABOUT HPUX

rpccp_remove_member

remove member(1m)														 remove member(1m)

NAME

       remove member - Removes a specified member from a group

SYNOPSIS

       rpccp remove member  group-entry-name -m member [-s syntax]

OPTIONS

       Declares  the  entry  name  of the group member to be removed (required).  Indicates the name syntax of the entry name (optional). The only
       value for this option is the dce name syntax, which is the default name syntax. Until an alternative name syntax becomes available,  speci-
       fying the -s option is unnecessary.

ARGUMENTS

       Indicates  the  name  of  the  target group.  For an entry in the local cell, you can omit the cell name and specify only the cell-relative
       name.

DESCRIPTION

       The remove member command removes a specified member from a specified group.

   Privilege Required
       You need read permission and write permission to the CDS object entry (the target group entry).

NOTE

       This command is replaced at Revision 1.1 by the dcecp command and may not be provided in future releases of DCE.

EXAMPLES

       The following commands run RPCCP and remove the member /.:/LandS/anthro/Cal_host_2 from the group  /.:/LandS/dept/Calendar_group:  $  rpccp
       rpccp>  remove  member	  >  -m /.:/LandS/anthro/Cal_host_2   > /.:/LandS/anthro/Calendar_group The following command removes the member
       /.:/LandS/anthro/Cal_host_3 from the group /.:/LandS/anthro/Calendar_group: $ rpccp remove member   > -m /.:/LandS/anthro/Cal_host_3    >
       /.:/LandS/anthro/Calendar_group

RELATED INFORMATION

       Commands: add member(1m), remove group(1m), show group(1m)

																 remove member(1m)
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