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Full Discussion: Replacing settings in config files.
Top Forums UNIX for Beginners Questions & Answers Replacing settings in config files. Post 303008138 by MadeInGermany on Monday 27th of November 2017 05:03:40 PM
Old 11-27-2017
With shell builtins (no external command awk, sed, perl)
here is a standard procedure
Code:
fn="file.conf"
# split on =, change the certain value, write to .new file:
while IFS="=" read key val
do
  case $key in
  "Another Setting") val=27;;
  esac
  printf "%s\n" "$key=$val"
done < $fn > $fn.new
# If successful
if [ $? -eq 0 ]
then
  # copy back to the original file; if successful delete the .new file
  cp $fn.new $fn &&
  rm $fn.new
fi

 

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LEARN ABOUT DEBIAN

rlmgr

RLMGR(1)						      Quick Database Manager							  RLMGR(1)

NAME

       rlmgr - administration utility for QDBM Relic

SYNOPSIS

       rlmgr create name
       rlmgr store [-kx] [-vx|-vf] [-insert] name key val
       rlmgr delete [-kx] name key
       rlmgr fetch [-kx] [-ox] [-n] name key
       rlmgr list [-ox] name

DESCRIPTION

       This manual page documents briefly the rlmgr commands.

       rlmgr  is  a  utility for debugging Relic and its applications. It features editing and checking of a database. It can be used for database
       applications with shell scripts. This command is used in the above format.  name specifies a database name. key	specifies  the	key  of  a
       record. val specifies the value of a record.

OPTIONS

       A summary of options is included below.	For a complete description, see the file:///usr/share/doc/qdbm-doc/spex.html#reliccli.

       -kx    treat key as a binary expression of hexadecimal notation.

       -vx    treat val as a binary expression of hexadecimal notation.

       -vf    read the value from a file specified with val.

       -insert
	      specify the storing mode for `DBM_INSERT'.

       -ox    treat the output as a binary expression of hexadecimal notation.

       -n     do not output the tailing newline.

SEE ALSO

       qdbm(3), relic(3).

AUTHOR

       QDBM was written by Mikio Hirabayashi <mikio@fallabs.com>.

       This manual page was written by Fumitoshi UKAI <ukai@debian.or.jp>, for the Debian project (but may be used by others).

Man Page							    2005-05-23								  RLMGR(1)
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