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Full Discussion: Unexpected sed result.
Top Forums Shell Programming and Scripting Unexpected sed result. Post 302247008 by viRaven on Tuesday 14th of October 2008 06:46:45 PM
Old 10-14-2008
Unexpected sed result.
I am in the process of writing a script to change the grub password in the grub.conf file. I thought I had it figured out, but am running into an a problem I can't put my finger on.



Command I am running when I find that the grub.conf file contains "password --md5".
Code:
sed "s=password.*=password --md5 "$grubPW"=g" /boot/grub/grub.conf

If I run it from the shell prompt it works as expected, but when I put it into my script it doesn't replace the search string, it does add the replacement string though.

I switched the traditional '/'s to "="s because the hashed password will sometimes contain slashes.

Expected Result:
password --md5 $1$5fKefK.fw/FeMM4d2D

Actual Result:
password --md5 $1$5fKefK.fw/FeMM4d2D
password --md5

I should just end up with the one line containing the hash value.
 

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LEARN ABOUT REDHAT

grub

GRUB(8) 								FSF								   GRUB(8)

NAME

       grub - the grub shell

SYNOPSIS

       grub [OPTION]...

DESCRIPTION

       Enter the GRand Unified Bootloader command shell.

       --batch
	      turn on batch mode for non-interactive use

       --boot-drive=DRIVE
	      specify stage2 boot_drive [default=0x0]

       --config-file=FILE
	      specify stage2 config_file [default=/boot/grub/grub.conf]

       --device-map=FILE
	      use the device map file FILE

       --help display this message and exit

       --hold wait until a debugger will attach

       --install-partition=PAR
	      specify stage2 install_partition [default=0x20000]

       --no-config-file
	      do not use the config file

       --no-curses
	      do not use curses

       --no-floppy
	      do not probe any floppy drive

       --no-pager
	      do not use internal pager

       --preset-menu
	      use the preset menu

       --probe-second-floppy
	      probe the second floppy drive

       --read-only
	      do not write anything to devices

       --verbose
	      print verbose messages

       --version
	      print version information and exit

REPORTING BUGS

       Report bugs to <bug-grub@gnu.org>.

SEE ALSO

       The  full documentation for grub is maintained as a Texinfo manual.  If the info and grub programs are properly installed at your site, the
       command

	      info grub

       should give you access to the complete manual.

grub (GNU GRUB 0.93)						   December 2002							   GRUB(8)
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