12-22-2008
Quote:
Originally Posted by
pritam1980
Hi All
I have a script which is....
if [ "file1.log" -nt "file2.txt" ]
then
touch file2.txt
else
kill -9 `ps -ef | grep -i /opt/xxx/bin/yyy | grep -v grep | awk '{print $2}'`
fi
What does it do? specially what is this logical checking?
if [ "file1.log" -nt "file2.txt" ]
I am not able to understand the "-nt" option...
Thanks in advance
Pritam
Hello Pritam,
[Chapter 13] 13.3 Understanding Shell Scripts
"Read it is good for the mind"
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ZGREP(1) General Commands Manual ZGREP(1)
NAME
zgrep - search possibly compressed files for a regular expression
SYNOPSIS
zgrep [ grep_options ] [ -e ] pattern filename...
DESCRIPTION
Zgrep invokes grep on compressed or gzipped files. These grep options will cause zgrep to terminate with an error code:
(-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*). All other options specified are passed directly to grep. If no file is specified, then the
standard input is decompressed if necessary and fed to grep. Otherwise the given files are uncompressed if necessary and fed to grep.
If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.
EXIT CODE
2 - An option that is not supported was specified.
AUTHOR
Charles Levert (charles@comm.polymtl.ca)
SEE ALSO
grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)
ZGREP(1)