Never Forget to Start Screen Again

There a few systems that I frequently work on from multiple locations. I like to be able to log back in and pick up where I left off after disconnecting and screen is great for that, but I have to remember to start it before I do anything else. After forgetting one too many times, I figured out how to start it automatically when I open an interactive SSH session. Here’s what I came up with:

# Add to the bottom of ~/.profile
# Check if this is being called from an interactive shell
case "$-" in
*i*)
# Great, it's an interactive shell. Is this shell being stated by sshd?
# Thanks to "Peter from Bavaria" for pointing out that readlink /proc/$PPID/exe
# no longer works as non-root and sugguesting the more portable ps solution
if [ "X$(ps -p $PPID -o comm=)" = "Xsshd" ]
then
  # exec screen. Attach to or create a new session called auto_ssh.
  # -x allows multiple copies of screen to be attached to the same session.
  exec screen -xR auto_ssh
fi
esac

1	`# Add to the bottom of ~/.profile`
2	`# Check if this is being called from an interactive shell`
3	`case "$-" in`
4	`i)`
5	`# Great, it's an interactive shell. Is this shell being stated by sshd?`
6	`# Thanks to "Peter from Bavaria" for pointing out that readlink /proc/$PPID/exe`
7	`# no longer works as non-root and sugguesting the more portable ps solution`
8	`if [ "X$(ps -p $PPID -o comm=)" = "Xsshd" ]`
9	`then`
10	`# exec screen. Attach to or create a new session called auto_ssh.`
11	`# -x allows multiple copies of screen to be attached to the same session.`
12	`exec screen -xR auto_ssh`
13	`fi`
14	`esac`