Bash Shell Scripting Disable Control-C [ CTRL+C ] Keys

I want to disable Control-C while running shell bash script program under UNIX / Linux like operating systems. How do I disable Control-C?

You need to use the trap command which can enable or disable keyboard keys such as Crtl-C. SIGINT is Crtl-C and it is represented using number 2. Signal names are case insensitive and the SIG prefix is optional. trap -l prints list of signal names and their corresponding numbers. Note that a signal can be sent to the shell with “kill -signal $$”.


# Signal 2 is Ctrl+C
# Okay disable it:
trap '' 2  
# Enable Ctrl+C
trap 2

Here is a sample shell script:

trap '' 2 
echo "This is a test. Hit [Ctrl+C] to test it..."
sleep 20
trap 2

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🐧 3 comments so far... add one

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3 comments… add one
  • PFudd Jul 30, 2012 @ 19:01

    Syntax error:
    trap 2
    should be
    trap – 2

  • PFudd Jul 30, 2012 @ 19:05

    Syntax error:
    trap 2
    should be
    trap – 2
    or else it will continue to ignore ctrl-c.

  • Rome May 6, 2017 @ 4:42

    is There way to disable ctrl Z too ?

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