replace spaces in filenames with underscores

rename 'y/ /_/' *
This command will replace all the spaces in all the filenames of the current directory with underscores. There are other commands that do this here, but this one is the easiest and shortest.

By: signal9
2009-06-27 22:20:47

3 Alternatives + Submit Alt

What Others Think

It should be noted that this "rename," while in Perl and portable, is not the standard rename utility on most systems.
dfego · 590 weeks and 6 days ago
It depends on what you mean by "most systems." Specifically, at least under debian/ubuntu linux, on systems with perl installed, the /usr/bin/prename perl script (to which is being referred) overrides the util-linux rename command. To explicitly invoke either (again, on debian/ubuntu) the perl variant is named prename, and the util-linux (likely dfego's default) may be invoked is /usr/bin/rename.ul .
bwoodacre · 590 weeks and 6 days ago
to do this purely in bash: for file in *;do mv $file ${file// /_};done
elzapp · 590 weeks and 4 days ago
Okay, not entirely purely, since the mv command is not a part of bash, but at least it would work without the
elzapp · 590 weeks and 4 days ago
Deja vu! rename overload! :-) Doesn't anyone bother to grep the archive before posting command lines any more?
mpb · 590 weeks and 4 days ago
I did grep the archive before I posted this and I did see several other commands that do the same as this one. However, this is, by far, the simplest and least complex command to date on here. So I thought I would drop it in. This is the first command I've submitted and it got into the "Hot this week" category! Yay!
signal9 · 590 weeks ago
This depends on the Perl 'prename' command to be installed -- popular on Debian-based distributions, where /usr/bin/rename is a link to this file. The POSIX version of 'rename' doesn't do regular expressions, only one-time substring matches. 'rename oldstring newstring list_of_files' I.E.: rename .htm .html *.htm
Mozai · 485 weeks and 5 days ago
Funny enough, ls -1 | while read file; do new_file=$(echo $file | sed s/\ //g); mv "$file" "$new_file"; done is the only command that actually works for me on a a CentOS 5.6 machine.
nzimas · 447 weeks and 3 days ago
the zsh eq would be: zmv '* *' '$f:gs/ /_'
khayyam · 396 weeks and 1 day ago
_(){ rename 'y/ /_/' "$*";}
Tiosam · 292 weeks and 1 day 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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