ssh.sh

#!/bin/bash
PORT=${PORT:-22}
SOCK=${SOCK:-/tmp/$(hostname).sock}
ps aux                         \
| grep -v grep                 \
| grep ssh                     \
| grep "$@"                    \
| grep -qi "$SOCK:0:$PORT"     \
|| ssh -vNC                    \
-oCompression=yes              \
-oGatewayPorts=yes             \
-oTCPKeepAlive=yes             \
-oConnectTimeout=9             \
-oConnectionAttempts=3         \
-oServerAliveCountMax=9        \
-oServerAliveInterval=5        \
-oUserKnownHostsFile=/dev/null \
-oExitOnForwardFailure=yes     \
-oStrictHostKeyChecking=no     \
-oStreamLocalBindUnlink=yes    \
-R $SOCK:0:$PORT $@            \
&