Displaying config files without comments

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• khav Member

  September 2014

  I found one guys
  cat file | egrep -v "^\s*(#|;|$)"
  Hope it helps someone
• khav Member

  September 2014 edited September 2014

  @Zen
  Can someone tell me how to create an alias for the command above
• t3k9 Member

  September 2014

  No need to use cat.

  egrep -v "^\s*(#|;|$)" <file>

  If you use bash, add this to .bashrc:

  ncom () { egrep -v "^\s*(#|;|$)" $1; }

  to create alias "ncom" for the command above.
• aus Member

  September 2014

  @khav said:

  echo 'newcommand() { cat "$@" | egrep -v "^\s*(#|;|$)" ;}' >> ~/.bashrc

  And run the command like this

  newcommand file
• khav Member

  September 2014 edited September 2014

  @aus

  I added it to bashrc but i still get newcommand not found
• aus Member

  September 2014

  @khav said:
  t3k9 i added the following to .bashrc
  cleanconfig () { egrep -v "^\s*(#|;|$)" $1; }

  Do i need to reboot the server or logout for it to take effect ?

  Type bash and it should take effect.

  Thanked by 1khav
• agentsmith Member

  September 2014

  you can use multiple -e statements. makes it easier to read.
  also filters empty lines...

  grep -v -e ^# -e '^;' -e '^[ \t]*$' /etc/apt/sources.list
  
• alessio Member

  September 2014

  aus said: Type bash and it should take effect.

  With yesterday's discovery this phrase gets a completely new meaning :-D
• khav Member

  September 2014

  @aus thanks it worked

  @alessio a patch for bash has already been issued