linux - restart sshd service

Question

Please enter the codeAlibaba Cloud's ubuntu server has an sshd daemon from the beginning and can be connected using putty
Modify the heartbeat packet time and modify /etc/ssh/sshd_config
When I wanted to restart the service, I found that there was no sshd under /etc/init.d, and a search found that sshd existed under /usr/sbin
Unable to execute sshd restart, sshd start , sshd stop and other commands, it is prompted that there is no such command.

Unable to restart sshd service

Finally, by directly killing the sshd process, and then directly executing /usr/sbin/sshd, you can start the sshd process again and load the modified configuration.

Please tell me how to restart the sshd service conveniently. Please don't talk about restarting ssh. I am talking about the process of sshd and ssh-server.

Answer 1

If you have already installed openssh-server的话(没有的话,要安装),因为Ubuntu已经使用Upstart来进行管理/etc/init.d里面的任务. 所以/etc/init.d/sshd start已经无效了.注意: 应该用sudo service ssh start(注意: 是ssh,不是sshd)启动sshd服务,之后可以通过进程查看sshdThe process is already running.

Answer 2

If you look at the /etc/init.d/ssh file, you will know that this file is the script to start, stop, and restart sshd, which is also called a service.
So you can start/stop/restart sshd via sudo /etc/init.d/ssh start/stop/restart or sudo service ssh start/stop/restart

case "" in
  start)
    check_for_upstart 1
    check_privsep_dir
    check_for_no_start
    check_dev_null
    log_daemon_msg "Starting OpenBSD Secure Shell server" "sshd" || true
    if start-stop-daemon --start --quiet --oknodo --pidfile /var/run/sshd.pid --exec /usr/sbin/sshd -- $SSHD_OPTS; then
        log_end_msg 0 || true
    else
        log_end_msg 1 || true
    fi
    ;;
  stop)
    check_for_upstart 0
    log_daemon_msg "Stopping OpenBSD Secure Shell server" "sshd" || true
    if start-stop-daemon --stop --quiet --oknodo --pidfile /var/run/sshd.pid; then
        log_end_msg 0 || true
    else
        log_end_msg 1 || true
    fi
    ;;

What is executed in this script is /usr/sbin/sshd

Answer 3

Directly killall/kill the process before starting