whereis:tldr:979c2
The "whereis" command is used to locate the binary, source code, and documentation files for a particular command or program in Linux or Unix systems. It is primarily used to determine the location of an executable file on the system.
In the given command "whereis ${ssh}", the "${ssh}" is a variable that represents the name of the SSH (Secure Shell) command. It is enclosed within curly braces "${}" to retrieve the value of the variable. So, the command would be expanded to "whereis ssh".
Once executed, the command will search for the SSH command's executable file on the system by looking through the directories specified in the PATH environment variable. It will display the path(s) to the binary file, along with any associated source code and documentation locations.
Overall, this command helps in finding the location of the SSH command on the system, making it easier to access and use the SSH functionality.