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Top Forums Shell Programming and Scripting SED - adding blank line after each Range Match Post 302324232 by danmauer on Wednesday 10th of June 2009 09:31:57 AM
Old 06-10-2009
Quote:
sed -n '/select/I,/;/{/;/G;p}
' infile
Awsome!...... in my quest to understand the hows and whys of SED, ( so as not to just be a coding monkey Smilie) could you explaing the part in red

sed -n '/select/I,/;/{/;/G;p}

i beleive the p is to output the results and /;/G to add a blank line..
but I don't understand the purpose/usage of the construct { .... } and the ; between G & p

Can you help me understand so i can use this in the future?


PS: could you recommend a usefull sed book?

Thanks in advance for you help
 

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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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