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How to keep ssh sessions alive

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How to keep ssh sessions alive

Command option

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ssh -o ServerAliveInterval=120 john@example.com

Config client file option

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# ~/.ssh/config
# "ServerAliveInterval" will send a “null packet” every 120 seconds on your SSH connections to keep them alive.
# For all hosts (Good)
ServerAliveInterval 120
# For a selection of hosts
Host example.com example2.com
  ServerAliveInterval 120