How Increase/decrease sudo time stamp in mac and linux

We sometime might feel like the sudo effect should stay for more than default 5 minutes in terminal to run multiple commands without getting password prompt. We can increase or decrease the sudo effect duration by modifying the time stamp. 
Note : It is advised not to change the default time stamp of 5 minutes as this might create security concerns. If you want to still increase the time stamp then follow below steps to increase/decrease.

  1. Open Terminal.
  2. Run command visudo in Terminal. (This will open /etc/sudoers file , Do not use any other method to open this file as this will corrupt the file, resulting in unexpected results)
  3. Edit the file in insert mode and write following line at the end of the file
          Defaults       env_reset,timestamp_timeout=60 
          Where 60 refers to 60 minutes.
          Note : 1. If you set the timeout to 0, you will be always prompted for a password.  
                     2. If you set to a value less than 0 then user's timestamp will never expire.



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