Top Forums Shell Programming and Scripting How do we display specific row of an output from bottom given line number? Post 303044014 by mohtashims on Wednesday 12th of February 2020 01:34:04 PM
Quote:
Originally Posted by RudiC
How can

Code:
-rwxrwxrwx 1 user1 user 15445 Feb 11 11:12 httpd-ssl.conf_1581408293

be the 4th newest file if
Code:
-rwxrwxrwx 1 user1 user 21627 Feb 11 17:17 httpd.conf_1581421731
-rwxrwxrwx 1 user1 user 15445 Feb 11 17:14 httpd-ssl.conf_1581421731
-rwxrwxrwx 1 user1 user 21624 Feb 11 17:13 httpd.conf_1581421456
-rwxrwxrwx 1 user1 user 15445 Feb 11 15:39 httpd-ssl.conf_1581421372

exist?
@Rudic sorry that was by overlook. With parameter 3 the row returned should be the third row ie.
Code:
-rwxrwxrwx 1 user1 user 21624 Feb 11 17:13 httpd.conf_1581421456

Likewise when the user passes 4 the 4th latest row should be returned i.e
Code:
-rwxrwxrwx 1 user1 user 15445 Feb 11 15:39 httpd-ssl.conf_1581421372

But, as I shared the output of your suggestion i get a list of rows and not that single particular row corresponding to the argument passed to the script.

@vbe thank you for the points you highlighted however, the parameter is checked by a Jenkins UI tool and my script will only be executed once a number is passed to that script by the user. Thus the argument to my script is certainly an integer.

Kindly suggest
 
Test Your Knowledge in Computers #349
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SHTOOL-SUBST.TMP(1)					      GNU Portable Shell Tool					       SHTOOL-SUBST.TMP(1)

NAME
shtool-subst - GNU shtool sed(1) substitution operations SYNOPSIS
shtool subst [-v|--verbose] [-t|--trace] [-n|--nop] [-w|--warning] [-q|--quiet] [-s|--stealth] [-i|--interactive] [-b|--backup ext] [-e|--exec cmd] [-f|--file cmd-file] [file] [file ...] DESCRIPTION
This command applies one or more sed(1) substitution operations to stdin or any number of files. OPTIONS
The following command line options are available. -v, --verbose Display some processing information. -t, --trace Enable the output of the essential shell commands which are executed. -n, --nop No operation mode. Actual execution of the essential shell commands which would be executed is suppressed. -w, --warning Show warning on substitution operation resulting in no content change on every file. The default is to show a warning on substitution operations resulted in no content change on all files. -q, --quiet Suppress warning on substitution operation resulting in no content change. -s, --stealth Stealth operation. Preserve timestamp on file. -i, --interactive Enter interactive mode where the user has to approve each operation. -b, --backup ext Preserve backup of original file using file name extension ext. Default is to overwrite the original file. -e, --exec cmd Specify sed(1) command directly. -f, --file cmd-file Read sed(1) command from file. EXAMPLE
# shell script shtool subst -i -e 's;(c) ([0-9]*)-2000;(c) 1-2001;' *.[ch] # RPM spec-file %install shtool subst -v -n -e 's;^(prefix=).*;1 $RPM_BUILD_ROOT%{_prefix};g' -e 's;^(sysconfdir=).*;1 $RPM_BUILD_ROOT%{_prefix}/etc;g' `find . -name Makefile -print` make install HISTORY
The GNU shtool subst command was originally written by Ralf S. Engelschall <rse@engelschall.com> in 2001 for GNU shtool. It was prompted by the need to have a uniform and convenient patching frontend to sed(1) operations in the OpenPKG package specifications. SEE ALSO
shtool(1), sed(1). 18-Jul-2008 shtool 2.0.8 SHTOOL-SUBST.TMP(1)

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