Recursive cat - concatenate files (filtered by extension) across multiple subdirectories into one file

find . -type f -name *.ext -exec cat {} > file.txt \;
Useful if you have to put together multiple files into one and they are scattered across subdirectories. For example: You need to combine all .sql files into one .sql file that would be sent to DBAs as a batch script. You do get a warning if you create a file by the same extension as the ones your searching for. find . -type f -name *.sql -exec cat {} > BatchFile.txt \;

By: realgt
2009-06-17 11:33:14

What Others Think

You know you're rewriting the file on each output, right?
ubersoldat · 633 weeks ago
@ubersoldat: No, he isn't. The output redirection is evaluated by the shell only once. However, this can be done much easier, safer and more efficient with zsh (this is one of the many reasons why I love zsh): cat **/*.ext > file.txt
inof · 633 weeks ago
I think the argument to -name should be quoted, otherwise the shell is needlessly expanding it. @inof I can see why one might think that you're cat-appending to the same file multiple times because the output redirection is put before the end of the argument to the -exec option. So a more readable and error-free form of the command would be: find . -type f -name "*.ext" -exec cat {} \; >filename.txt so that the arguments to find and the shell syntax are clearly separated. Bash 4.0 has added support for ** globbing, although this won't obsolete find :-).
bwoodacre · 633 weeks ago
Good stuff guys, your comments assisted me to pull text out of binary files from multiple files and directories by essentially just replacing cat with strings. Thanks for sharing your knowledge. find . -type f -name "*.*" -exec strings {} \; >alltext.out
gromburger · 616 weeks ago
Hi guys! Can you please explain me the purpose of the final backslash just after file.txt?
clapclash · 462 weeks and 6 days ago
I was doing "tree -fi | grep .txt | xargs cat &> output.txt". I like the globbing.
qdrizh · 346 weeks and 6 days ago
This website is mainly rheumatology near me focused on different programming codes. What do you mean by the recursion or concatenation? Yep they provided the programming code to contact made the files using the recursive statement across multiple subdirectories into one file
leonamargret · 8 weeks and 6 days ago
Through this website, the students will learn the concepts of commands in an easiest way. Such commands really arthritis and rheumatology help them to learn the commands so easily. There are experts, who are providing answers to any of your queries. Keep sharing more updates here.
Alyssalauren · 5 weeks and 6 days ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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