I have a directory with the files names as "a b c.jpg", "d e f 0.jpg", "g h i.jpg"
I need a script to have all the files ending with "0.jpg" to become "_0.jpg"
So, in the above example the second file should become "d e f_0.jpg"
3 Answers
I think your question should read that you want files ending with " 0.jpg" to become "_0.jpg" (note the space in the first quotes). That makes sense with your example.
for i in *\ 0.jpg ; do mv -- "$i" "${i/ 0.jpg/_0.jpg}" done That is, for every file matching the pattern "* 0.jpg", rename it replacing " 0.jpg" with "_0.jpg"
Edit: For added safety, consider using -n (no-clobber) or -i (interactive) as an option to mv(1).
3 Comments
Philipp
Good solution, +1. You might want to write
mv -- "$i" to guard agains filenames starting with a dash.
camh
Good point. Since we're using bash, we probably have GNU mv. Added.
Hoang Pham
hi, please explain which technique you are using here? I don't get it. "${i/ 0.jpg/_0.jpg}"
The rename tool might be what you need.
1 Comment
Dennis Williamson
That's part of MySQL so it may not be installed. Also, it works on the contents not the names of file.
ls -1 | grep .jpg | awk -F "." '{print $1 "_0." $2}' 
2 Comments
Philipp
This deserves at least three downvotes. Never use
ls in scripts, never use grep to match filenames, don't use external tools if there is a simpler builtin solution.
Gordon Davisson
It's worse than that: this doesn't actually rename anything, it just prints a list of new names. And it doesn't replace " 0" with "_0", it adds "_0". And it does this for all .jpg files, not just those ending in " 0.jpg". And if any of the filenames have additional period characters in them, it gets even sillier.