![]() ![]() The other sshd processes are child processes that serve a single connection. ![]() PPID PID PGID SID TTY TPGID STAT UID TIME COMMAND. ps axjfÄŻor example, it is easy to see in the following output that process 2183 is the master server. The following command can be used to display the process tree on Linux, and it is easy to see which one is the parent process. It is also the parent process of all the other sshd processes. Generally this process is the one with the lowest process id or the one that has been running the longest. The initial process acts as the master server that listens to incoming connections. The program is usually located at /usr/sbin/sshd. The sshd process is started when the system boots. Startup and Roles of Different sshd processes To get one for IBM z/OS mainframes, see Tectia SSH for Mainframes. To get an SSH server for Windows, see Tectia SSH. If the server does not start automatically, try using the service sshd start command, or just reboot the computer. On Red Hat derived distributions, the command would usually be: yum install openssh-server On Debian-derived distributions, the command to install an SSH server is usually: aptitude install openssh-server ![]() You can try ssh localhost to test if it is running if it respons with something like Connection refused, then it is not running. However, it is not always installed by default. The SSH server usually comes up as a readily installable package on most linux distributions. Contents How to Install SSH Server on Linux Startup and Roles of Different sshd processes Configuration File Logging Debugging SSH Connection Problems SSH Client -v Option Log Files Run the Server in Debug Mode Command-Line Options Getting Version Number of the Installed Server How to Install SSH Server on Linux ![]()
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