When to Use Exec?
Exec Is Useful When You Want to Run a Command, but You Don't Want a Bash Shell to Be the Parent Process. When You Exec a Command, It Replaces Bash Entirely...
exec is useful when you want to run a command, but you don't want a bash shell to be the parent process. When you exec a command, it replaces bash entirely — no new process is forked, no new PID is created, and all memory controlled by bash is destroyed and overwritten.
What is purpose of exec command?
The exec command is a powerful tool for manipulating file-descriptors (FD), creating output and error logging within scripts with a minimal change. In Linux, by default, file descriptor 0 is stdin (the standard input), 1 is stdout (the standard output), and 2 is stderr (the standard error).
Why we use exec command in Linux?
exec command in Linux is used to execute a command from the bash itself. This command does not create a new process it just replaces the bash with the command to be executed. If the exec command is successful, it does not return to the calling process.
James Sterling reports on renewable energy developments, climate policy, ecological conservation, and green tech innovations around the globe.
