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Top Forums Shell Programming and Scripting Replace specific column range in a non-delimited file with a string! Post 302843163 by ahamed101 on Monday 12th of August 2013 09:09:58 AM
Old 08-12-2013
Code:
sed 's/\([+-]\).*\(\*\*\)/\1TEST\2/' input_file

--ahamed

---------- Post updated at 06:09 AM ---------- Previous update was at 05:52 AM ----------

Using awk for specific columns

Code:
awk '{val=substr($0,21,19);gsub(val,"TEST",$0)}1' input_file

Note : 19 characters from position 21 which will cover from 21 to 40. So, you need to change it accordingly

HTH

--ahamed
 

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GRUB-RENDER-LABEL(1)                                               User Commands                                              GRUB-RENDER-LABEL(1)

NAME
grub-render-label - generate a .disk_label for Apple Macs. SYNOPSIS
grub-render-label [OPTION...] [OPTIONS] DESCRIPTION
Render Apple .disk_label. -b, --bgcolor=COLOR use COLOR for background -c, --color=COLOR use COLOR for text -f, --font=FILE use FILE as font (PF2). -i, --input=FILE read text from FILE. -o, --output=FILE set output filename. Default is STDOUT -t, --text=STRING set the label to render -v, --verbose print verbose messages. -?, --help give this help list --usage give a short usage message -V, --version print program version Mandatory or optional arguments to long options are also mandatory or optional for any corresponding short options. REPORTING BUGS
Report bugs to <bug-grub@gnu.org>. SEE ALSO
The full documentation for grub-render-label is maintained as a Texinfo manual. If the info and grub-render-label programs are properly installed at your site, the command info grub-render-label should give you access to the complete manual. grub-render-label (GRUB) 2.02-2ubuntu8.3 July 2018 GRUB-RENDER-LABEL(1)
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