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| <<Anchor(faq15)>> == How can I run a command on all files with the extension .gz? == Often a command already accepts several files as arguments, e.g. {{{ zcat -- *.gz }}} On some systems, you would use {{{gzcat}}} instead of {{{zcat}}}. If neither is available, or if you don't care to play guessing games, just use {{{gzip -dc}}} instead. The `--` prevents a filename beginning with a hyphen from causing unexpected results. If an explicit loop is desired, or if your command does not accept multiple filename arguments in one invocation, the {{{for}}} loop can be used: {{{ # Bourne for file in ./*.gz do echo "$file" # do something with "$file" done }}} To do it recursively, use [[UsingFind|find]]: {{{ # Bourne find . -name '*.gz' -type f -exec do-something {} \; }}} If you need to process the files inside your shell for some reason, then read the `find` results in a loop: {{{ # Bash while IFS= read -r file; do echo "Now processing $file" # do something fancy with "$file" done < <(find . -name '*.gz' -print) }}} This example uses ProcessSubstitution (see also [[BashFAQ/024|FAQ #24]]), although a pipe may also be suitable in many cases. However, it does not correctly handle filenames that contain newlines. To handle arbitrary filenames, see [[BashFAQ/020|FAQ #20]]. ---- CategoryShell |
Light Technician Anthony from Carignan, has hobbies and interests including cycling, Samsung,nokia,sony Xperia,iphone, and dolls. During the last year has made a visit to Rock Shelters of Bhimbetka. |
Light Technician Anthony from Carignan, has hobbies and interests including cycling, Samsung,nokia,sony Xperia,iphone, and dolls. During the last year has made a visit to Rock Shelters of Bhimbetka.