How to get the IP address from $SSH_CLIENT

sshvars=($SSH_CLIENT)
echo "${sshvars[0]}"

or:

echo "${SSH_CLIENT%% *}"

you can use set -- eg

$ SSH_CLIENT="10.0.40.177 52335 22"
$ set -- $SSH_CLIENT
$ echo $1  # first "element"
10.0.40.177
$ echo $2  # second "element"
52335
$ echo $3
22

For strings, as is the case here, the <<< operator may be used:

$ read ipaddress outport inport <<< $SSH_CLIENT

See e.g: Linux Bash: Multiple variable assignment. Don't do this with binary input though: Is there a binary safe <<< in bash?

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