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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
}}}

(One 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.) 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:

{{{
    for file in *.gz
    do
        echo "$file"
        # do something with "$file"
    done
}}}

To do it recursively, you should use a loop, plus the find command:

{{{
    while read file; do
        echo "$file"
        # do something with "$file"
    done < <(find . -name '*.gz' -print)
}}}

For more hints in this direction, see [#faq20 FAQ #20], below. To see why the find command comes after the loop instead of before it, see [#faq24 FAQ #24].
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.

BashFAQ/015 (last edited 2015-03-05 00:30:34 by izabera)