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Full Discussion: how to use if condition with sed command in BASH
Operating Systems Linux Red Hat how to use if condition with sed command in BASH Post 302632823 by spacebar on Monday 30th of April 2012 10:59:15 PM
Old 04-30-2012
This is a simple script that should do it for you:
Code:
#!/bin/bash
const='tinker panic 0'
if [ -e /etc/ntp.conf ]; then
  grep -q -e "$const" /etc/ntp.conf
  if [ $? = 1 ]; then
    echo "$const  ; not found but will be inserted as first line!"
    sed -i.bak '1 i\tinker panic 0' /etc/ntp.conf
  fi
fi
# Add '#' to beginning of line if it is not already there
sed -i.bak \
    -e 's/^server 127.127.1.0$/#server 127.127.1.0/' \
    -e 's/^local clock$/#local clock/' \
    -e 's/^fudge 127.127.1.0 stratum 10$/#fudge 127.127.1.0 stratum 10/' /etc/ntp.conf

hth
This User Gave Thanks to spacebar For This Post:
lamoul
 

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LEARN ABOUT DEBIAN

vconsole.conf

VCONSOLE.CONF(5)						   vconsole.conf						  VCONSOLE.CONF(5)

NAME

       vconsole.conf - configuration file for the virtual console

SYNOPSIS

       /etc/vconsole.conf

DESCRIPTION

       The /etc/vconsole.conf file configures the virtual console, i.e. keyboard mapping and console font.

       The basic file format of the vconsole.conf is a newline-separated list environment-like shell-compatible variable assignments. It is
       possible to source the configuration from shell scripts, however, beyond mere variable assignments no shell features are supported,
       allowing applications to read the file without implementing a shell compatible execution engine.

       Note that the kernel command line options vconsole.keymap=, vconsole.keymap.toggle=, vconsole.font=, vconsole.font.map=,
       vconsole.font.unimap= may be used to override the console settings at boot.

       Depending on the operating system other configuration files might be checked for configuration of the virtual console as well, however only
       as fallback.

OPTIONS

       The following options are understood:

       KEYMAP=, KEYMAP_TOGGLE=
	   Configures the key mapping table of for they keyboard.  KEYMAP= defaults to us if not set. The KEYMAP_TOGGLE= can be used to configured
	   a second toggle keymap and is by default unset.

       FONT=, FONT_MAP=, FONT_UNIMAP=
	   Configures the console font, the console map and the unicode font map.  FONT= defaults to latarcyrheb-sun16.

EXAMPLE

       Example 1. German keyboard and console

       /etc/vconsole.conf:

	   KEYMAP=de-latin1
	   FONT=latarcyrheb-sun16

SEE ALSO

       systemd(1), loadkeys(1), setfont(8), locale.conf(5)

AUTHOR

       Lennart Poettering <lennart@poettering.net>
	   Developer

systemd 							    10/07/2013							  VCONSOLE.CONF(5)
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