# xe > Execute a command once for each line piped from another command or file. > More information: . - Run a command once for each line of input data as arguments: `{{arguments_source}} | xe {{command}}` - Execute the commands, replacing any occurrence of the placeholder (marked as `{}`) with the input line: `{{arguments_source}} | xe {{command}} {} {{optional_extra_arguments}}` - Execute a shellscript, joining every `N` lines into a single call: `echo -e 'a\nb' | xe -N{{2}} -s 'echo $2 $1'` - Delete all files with a `.backup` extension: `find . -name {{'*.backup'}} | xe rm -v` - Run up to `max-jobs` processes in parallel; the default is 1. If `max-jobs` is 0, xe will run as many processes as cpu cores: `{{arguments_source}} | xe -j {{max-jobs}} {{command}}`