Diff for "BashFAQ/015"

Differences between revisions 1 and 4 (spanning 3 versions)

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:

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

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

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

For more hints in this direction, see [:BashFAQ/020:FAQ #20]. To see why the find command comes after the loop instead of before it, see [:BashFAQ/024:FAQ #24].

-  ⇤ ← Revision 1 as of 2007-05-02 23:00:23 → 
  Size: 983
  Editor: redondos
  Comment:
+   ← Revision 4 as of 2008-05-08 23:52:27 → ⇥
  Size: 1029
  Editor: GreyCat
  Comment: adjust links
-Deletions are marked like this.
+Additions are marked like this.
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-== How can I run a command on all files with the extention .gz? ==
+== How can I run a command on all files with the extension .gz? ==
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+    # Bourne
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+Line 20:
-To do it recursively, you should use a loop, plus the find command:
+To do it recursively, you should use a loop, plus the [:UsingFind:find] command:
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+    # Bash
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-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].
+For more hints in this direction, see [:BashFAQ/020:FAQ #20].  To see why the `find` command comes after the loop instead of before it, see [:BashFAQ/024:FAQ #24].