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Top Forums UNIX for Dummies Questions & Answers i am not getting any idea how to do the following with SED cmd Post 302340154 by sankar_vitam on Monday 3rd of August 2009 01:03:21 AM
Old 08-03-2009
ok sir i agree with you; but i tried by using the following sed commands

1)$sed 's/^.//' myfile1
2)$sed 's/..$//' myfile1
3)$sed 's/ \([a-z]*\)/ \([a-z]*\)/ \2,\1' myfile1

NOte but i am not getting the required output plz help


my
given input file "myfile1" is as follows

root pts/1 july3109 192.200.200.9
cse1 pts/2 july3109 192.200.200.10
cse2 pts/3 july3109 192.200.200.11
cse3 pts/4 july3108 192.200.200.12


output to be required is (using sed commads):
1) delete the first character in each line of the above input file
2)and deletes the character before the last character in each line of the above file
3)swap the first and 2nd words in the above file
 

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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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