Passing a variable in a bash script to sshpass

Question

I am trying to pass a variable in a bash script to sshpass. Here is my code for reference:

NAME="HARRY"
sshpass -p passwd ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -q ipaddress 'bash -s' << 'EOF'
   echo $NAME
EOF

How can I pass the variable in a bash script to sshpass? Thank you!

Answer 1

Easiest way is using env just before running bash

NAME="HARRY"
sshpass -p passwd ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -q ipaddress env NAME="$NAME" 'bash -s' << 'EOF'
   echo $NAME
EOF

You can pass multiple variables with multiple env statements like

export NAME="HARRY"
export SOMEVAR="hello"
sshpass -p passwd ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -q ipaddress env NAME="$NAME" env SOMEVAR="$SOMEVAR" 'bash -s' << 'EOF'
   echo $NAME
EOF

Be aware that your variables might be interpreted when passing them. You can avoid that by changing env NAME="$NAME" to uninterpreted version env NAME="'$NAME'"