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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)
command line - What does exec do? - Ask Ubuntu The exec you have executed is a shell built-in : $ type -a exec exec is a shell builtin Now from help exec : Replace the shell with the given command Execute COMMAND, replacing this shell with the specified program ARGUMENTS become the arguments to COMMAND If COMMAND is not specified, any redirections take effect in the current shell
What does {} \\; mean in the find command? - Ask Ubuntu If you run find with exec, {} expands to the pathname of each file or directory found with find (so that ls in your example gets every found pathname as an argument - note that it calls ls or whatever other command you specify once for each file found) Semicolon ; ends the command executed by exec It needs to be escaped with \ so that the shell you run find inside does not treat it as its
What are possible use of exec command? - Ask Ubuntu The exec command replaces the current shell process with the specified command Normally, when you run a command a new process is spawned (forked) The exec command does not spawn a new process Instead, the current process is overlaid with the new command In other words the exec command is executed in place of the current shell without creating a new process There are three most common uses
in finds -exec command? - Unix Linux Stack Exchange As per man find: -exec command {} + This variant of the -exec action runs the specified command on the selected files, but the command line is built by appending each selected file name at the end; the total number of invocations of the command will be much less than the number of matched files The command line is built in much the same way that xargs builds its command lines Only one