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Full Discussion: Sed/replace using variable
Top Forums Shell Programming and Scripting Sed/replace using variable Post 302926489 by ongoto on Monday 24th of November 2014 05:28:10 PM
Old 11-24-2014
Don't see LINUX or LVM in the output of fdisk -l. Maybe you are using other than GNU Linux?

What I see here...
Code:
NewDisk=`fdisk -l | grep Linux | egrep -v '\*|LVM' |awk '{print $1}' | sed 's/\/dev\///'`
echo $NewDisk
# -- produces --
# sda5 sda6 sda7 sda10 sda11 sda12 sdf2 sdf5 sdf6 sdf7 sdf8 sdf9 sdf10 sdf11

# (using sed -e to debug)
sed -e "s/^cdrom/harddrive --partition=$NewDisk --dir=\//"
# -- produces --
# error

In my case, $NewDisk appears to sed as a space separated list of commands, which are bogus...
The fix for me would be to make $NewDisk an array and access by [index]
Code:
NewDisk=(`fdisk -l | grep Linux | egrep -v '\*|LVM' |awk '{print $1}' | sed 's/\/dev\///'`)
sed -e "s/^cdrom/harddrive --partition=${NewDisk[0]} --dir=\//"

In your case, making $NewDisk=csicc/c0d0p5 like you reported, still throws an error because sed sees the /slash in csicc/c0d0p5 as a delimiter...
So change the delimiter in sed from / to |...(ala Scrutinizer post #2)

Code:
NewDisk=csicc/c0d0p5
sed -e "s|^cdrom|harddrive --partition=$NewDisk --dir=\/|"
-- produces --
harddrive --partition=csicc/c0d0p5 --dir=/

Give it a go and lemme know if I need to make any edits here.

Thx
Last edited by ongoto; 11-24-2014 at 06:44 PM..
This User Gave Thanks to ongoto For This Post:
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LEARN ABOUT REDHAT

replace

REPLACE(1)						      General Commands Manual							REPLACE(1)

NAME

       replace	-  A utility program that is used by msql2mysql, but that has more general applicability as well. replace changes strings in place
       in files or on the standard input. Uses a finite state machine to match longer strings first. Can be used to swap strings.

USAGE

       replace [-?svIV] from to from to ... -- [files]

       or

       replace [-?svIV] from to from to ... < fromfile > tofile

SYNOPSIS

       replace [-?|-I] [-s] [-v]

DESCRIPTION

       replace

       -?|-I  info

       -s     silent

       -v     verbose

EXTRA INFO

       Special characters in from string:

       ^     Match start of line.

       $     Match end of line.

            Match space-character, start of line or end of line. For a end  the next replace starts locking at the end space-character.  A	
	      alone in a string matches only a space-character.

EXAMPLE

       this command swaps a and b in the given files:

       shell> replace a b b a -- file1 file2 ...

SEE ALSO

       isamchk	(1),  isamlog (1), mysqlaccess (1), mysqladmin (1), mysqlbug (1), mysqld (1), mysqldump (1), mysqlshow (1), msql2mysql (1), perror
       (1), replace (1), safe_mysqld (1), which1 (1), zap (1),

AUTHOR

       Ver 1.0, distribution 3.23.29a Michael (Monty) Widenius (monty@tcx.se), TCX Datakonsult AB (http://www.tcx.se).	This software  comes  with
       no  warranty.  Manual page by L. (Kill-9) Pedersen (kill-9@kill-9.dk), Mercurmedia Data Model Architect / system developer (http://www.mer-
       curmedia.com)

								 20 December 2000							REPLACE(1)
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