1 #!/bash/sh
  2 set -e
  3 USER="admin"
  4 HOST="1.2.3.4"
  5 PASSWORD="$(cat password.txt)"
  6
  7 sshpass -p"$PASSWORD" ssh -t $USER@$HOST "/usr/bin/sudo bash -c 'sudo ls 2>&1; echo "testing";sudo ls src 2>&1;exit;'" >> log.txt
  8
  9 echo "------------------------------Another Method ----------------------------------------"
 10 sshpass -p"$PASSWORD" ssh -t $USER@$HOST << EOF
 11 echo "....1...."
 12 sudo ls 2>&1
 13 echo "....2...."
 14 ls src 2>&1
 15 sudo echo "....3...."
 16 exit
 17 EOF

....1....
sudo: no tty present and no askpass program specified
sudo: pam_authenticate: User not known to the underlying authentication module
....2....
tmp
....3....

sshpass -p"$PASSWORD" ssh -t $USER@$HOST <<'EOF' >>log.txt
 echo "....1...."
 sudo ls 2>&1
 : etc
EOF