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Full Discussion: SED variable substitution
Top Forums Shell Programming and Scripting SED variable substitution Post 302359333 by pludi on Tuesday 6th of October 2009 09:41:10 AM
Old 10-06-2009
You have a whitespaces in you $date_var, so
Code:
sed '/^'$date_var'/,/^'$end_string'/!d' Interface.log | sed '/^#/d' | sed '$d' >> current_day_log.txt

is seen by the shell as (example)
Code:
sed /^01 Oct 2009/,/^01 Oct 2009 12:14:21/!d Interface.log | sed /^#/d | sed $d >> current_day_log.txt

This means that the sed command isn't seen as one parameter, but several, breaking the structure/command.

Better write it as
Code:
sed '/^'"$date_var"'/,/^'"$end_string"'/!d' Interface.log | sed '/^#/d' | sed '$d' >> current_day_log.txt

so that the whitespaces aren't seen as parameter delimiters, without running into parameter expansion problems.
 

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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.

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