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Shell Programming and Scripting
bash: delete a string from last line
Post 302564141 by Chella15 on Thursday 13th of October 2011 02:49:35 AM
10-13-2011
@ygemici
Sorry for the late reply... i was trying a couple of other things too..
When i tried to grep with a file name what u said below works... but it doesnt work with a variable name. Were u able to successfully execute this ? Is infile considered like a variable name ?
# grep "'||chr(" infile -n|cut -d: -f1
grep "'||chr(" new.html -n |cut -d: -f1 > new1.html works fine.
Also i did - man grep and the syntax seems to accept only file name.
With SED (accepts file and pipeline inputs), i was able to use a variable name but it wasnt able to replace the last line.. instead it replaced all lines...
This is what i used ( also tried simple examples)
name=`echo $data | sed '$s/'\''||chr(10)||/ /g'`
Expectation:
$s would replace in the last line
replace '||chr(10)|| with blank
Note: in my file there are more than one line that has that string similar to your example.
Sorry for the late reply... i was trying a couple of other things too..
When i tried to grep with a file name what u said below works... but it doesnt work with a variable name. Were u able to successfully execute this ? Is infile considered like a variable name ?
# grep "'||chr(" infile -n|cut -d: -f1
grep "'||chr(" new.html -n |cut -d: -f1 > new1.html works fine.
Also i did - man grep and the syntax seems to accept only file name.
With SED (accepts file and pipeline inputs), i was able to use a variable name but it wasnt able to replace the last line.. instead it replaced all lines...
This is what i used ( also tried simple examples)
name=`echo $data | sed '$s/'\''||chr(10)||/ /g'`
Expectation:
$s would replace in the last line
replace '||chr(10)|| with blank
Note: in my file there are more than one line that has that string similar to your example.
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LEARN ABOUT X11R4
zgrep
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)