[bash] ssh "bash -s" sudo 실행시 오류

 

aa.sh 파일 내용

#!/bin/bash
sudo hostname

 

ssh 를 "bash -s" 로 실행시 sudo 명령어가 있는 경우 오류가 발생한다

# script 파일 안에 sudo 명령이 있거나
ssh user@server "bash -s" < aa.sh

# heredoc 사용시 sudo 명령이 있으면
ssh user@server "bash -s" << EOF
sudo hostname
EOF

# 아래 오류 메시지가 나온다
sudo: a terminal is required to read the password; either use the -S option to read from standard input or configure an askpass helper

 

echo "password" | ssh -t "sudo -S bash -s" 를 사용한다

# 로컬 script 파일을 실행
echo "password" | ssh -t user@server "sudo -S bash -s" < aa.sh

# heredoc 으로 실행
echo "password" | ssh -t user@server "sudo -S bash -s" << EOF
sudo hostname
EOF

 

sudo --help 내용

Options:
  -A, --askpass                 use a helper program for password prompting
  -p, --prompt=prompt           use the specified password prompt
  -S, --stdin                   read password from standard input

$ sudo --help
sudo - execute a command as another user

usage: sudo -h | -K | -k | -V
usage: sudo -v [-ABkNnS] [-g group] [-h host] [-p prompt] [-u user]
usage: sudo -l [-ABkNnS] [-g group] [-h host] [-p prompt] [-U user] [-u user] [command [arg ...]]
usage: sudo [-ABbEHkNnPS] [-C num] [-D directory] [-g group] [-h host] [-p prompt] [-R directory] [-T timeout] [-u user] [VAR=value] [-i | -s] [command [arg ...]]
usage: sudo -e [-ABkNnS] [-C num] [-D directory] [-g group] [-h host] [-p prompt] [-R directory] [-T timeout] [-u user] file ...

Options:
  -A, --askpass                 use a helper program for password prompting
  -b, --background              run command in the background
  -B, --bell                    ring bell when prompting
  -C, --close-from=num          close all file descriptors >= num
  -D, --chdir=directory         change the working directory before running command
  -E, --preserve-env            preserve user environment when running command
      --preserve-env=list       preserve specific environment variables
  -e, --edit                    edit files instead of running a command
  -g, --group=group             run command as the specified group name or ID
  -H, --set-home                set HOME variable to target user's home dir
  -h, --help                    display help message and exit
  -h, --host=host               run command on host (if supported by plugin)
  -i, --login                   run login shell as the target user; a command may also be specified
  -K, --remove-timestamp        remove timestamp file completely
  -k, --reset-timestamp         invalidate timestamp file
  -l, --list                    list user's privileges or check a specific command; use twice for longer format
  -n, --non-interactive         non-interactive mode, no prompts are used
  -P, --preserve-groups         preserve group vector instead of setting to target's
  -p, --prompt=prompt           use the specified password prompt
  -R, --chroot=directory        change the root directory before running command
  -S, --stdin                   read password from standard input
  -s, --shell                   run shell as the target user; a command may also be specified
  -T, --command-timeout=timeout terminate command after the specified time limit
  -U, --other-user=user         in list mode, display privileges for user
  -u, --user=user               run command (or edit file) as specified user name or ID
  -V, --version                 display version information and exit
  -v, --validate                update user's timestamp without running a command
  --                            stop processing command line arguments