What are the uses of the exec command in shell scripts? There are two uses of exec in shells like ksh and bash - used for opening file descriptors Here are some examples: Note that spacing is very important here If you place a space between the fd number and the redirection symbol then exec reverts to the original meaning: exec 3 < thisfile # oops, overwrite the current program with command "3"
The “exec” Command in Linux [8 Practical Examples] - LinuxSimply The exec command replaces the current terminal process with a new command This command in Linux often executes specific programs or commands without creating a new process In this article, I will demonstrate to you the ins and outs of the exec command in Linux
exec Cheat Sheet - exec Command Line Guide The exec command in Linux is used to replace the current shell process with a specified command When you run exec, the shell process is replaced by the new command, and the shell itself no longer exists This can be useful for optimizing resource usage in scripts by eliminating the…
What does `exec $@` do? - Unix Linux Stack Exchange The exec will replace the current process with the process resulting from executing its argument In short, exec "$@" will run the command given by the command line parameters in such a way that the current process is replaced by it (if the exec is able to execute the command at all)
The Uses of the Exec Command in Shell Script - Baeldung When we create Bash scripts, we may want to redirect the output of all the echo statements into a log file without explicitly specifying the redirection operator and log file name after every echo statement The Bash exec command is a powerful built-in utility that can be utilized for this purpose
How to use the command `exec` (with examples) The exec command is a powerful feature in Unix-like operating systems, including Linux, that runs specified commands by replacing the current shell process with a new process for the command being executed Unlike other commands that spawn a child process, exec transforms the existing shell process This behavior is particularly useful for
exec - Linux Command Guide The exec command is a shell built-in that replaces the current shell process with the specified command, without creating a new process When used without a command, it can be used to manipulate file descriptors
cheat. sh exec It can make redirections take effect in the current shell # Redirect all STDOUT from within a script to the given file exec > foo log # Redirect all of both STDOUT STDERR from within a script to the given file exec > foo log 2 > 1 # Or, if on bash(1), this syntax is also viable: exec > foo log # Copy output to a log file, allowing the