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Full Discussion: shell variables advanced
Top Forums Shell Programming and Scripting shell variables advanced Post 302339026 by edidataguy on Wednesday 29th of July 2009 02:03:29 PM
Old 07-29-2009
Quote:
Originally Posted by edidataguy
1. "set" lists all variables. Double check, your variable must be there.
Try this:
Code:
 
aassdd="blabla" (or set aassdd="blabla")
echo $aassdd
set | grep aassdd

2. "env" list all environment variables.

3. For variable with space use quotes.
Code:
 
    qq="aaa                  vvv"
    echo $qq       # output will be ==> aaa vvv
    echo "$qq"     # output will be ==> aaa                  vvv

4. For $IFS do the same as before:
Code:
 
    set | grep "$IFS"

Sorry an error. It should read as:
Code:
set | grep "^IFS"


Last edited by edidataguy; 07-29-2009 at 03:12 PM..
 

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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)
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