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# Bourne | |
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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 [:BashFAQ#faq20:FAQ #20], below. To see why the find command comes after the loop instead of before it, see [:BashFAQ#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]]. |
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 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 FAQ #20. To see why the find command comes after the loop instead of before it, see FAQ #24.