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Full Discussion: Can't understand the script
Top Forums Shell Programming and Scripting Can't understand the script Post 302380520 by durden_tyler on Tuesday 15th of December 2009 11:32:07 AM
Old 12-15-2009
Quote:
Originally Posted by shahdharmit
...
2nd cmd give the following error-
Code:
sort: open failed: +1n: No such file or directory

Seems like the syntax is incorrect in this command:

Code:
$
$ cut -d: -f1,3,7 /etc/passwd |sort -t: +1n
sort: open failed: +1n: No such file or directory
$

As can be seen by the following:

Code:
$
$ sort -t: +1n /etc/passwd
sort: open failed: +1n: No such file or directory
$

If you want to sort the output (numerically) by the 2nd field, which is the 3rd field in the original /etc/passwd file, then -

Code:
cut -d: -f1,3,7 /etc/passwd | sort -t: -k2,2n

tyler_durden
 

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service(8)						      System Manager's Manual							service(8)

NAME
service - run a System V init script SYNOPSIS
service SCRIPT COMMAND [OPTIONS] service --status-all service --help | -h | --version DESCRIPTION
service runs a System V init script in as predictable environment as possible, removing most environment variables and with current working directory set to /. The SCRIPT parameter specifies a System V init script, located in /etc/init.d/SCRIPT. The supported values of COMMAND depend on the invoked script, service passes COMMAND and OPTIONS it to the init script unmodified. All scripts should support at least the start and stop commands. As a special case, if COMMAND is --full-restart, the script is run twice, first with the stop command, then with the start command. service --status-all runs all init scripts, in alphabetical order, with the status command. EXIT CODES
service calls the init script and returns the status returned by it. FILES
/etc/init.d The directory containing System V init scripts. ENVIRONMENT
LANG, TERM The only environment variables passed to the init scripts. SEE ALSO
/etc/init.d/skeleton, update-rc.d(8), init(8), invoke-rc.d(8). Jan 2006 service(8)
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