I'm using this command to rename files:
for fname in *;
do
mv "$fname" $(echo "$fname" | sha1sum | cut -f1 -d' ')
done
But it only renames in the current directory. Let's say I have many directories, and each directory contains some other directories, and last directory tree contains files. I want to rename them with random characters.
I think find . -type f should work, and have tried it, but still did not get any working command.
With find:
find . -type f -exec sh -c 'SHELL COMMAND' {} \;
This invokes SHELL COMMAND on each found file in turn; the file name is "$0". Thus:
find . -type f -exec sh -c '
mv "$0" "${0%/*}/$(printf "%s\n" "${0##*/}" | sha1sum | cut -d" " -f1)"
' {} \;
(Note the use of printf rather than echo, in case you have a file called -e or -n or a few other problematic cases that echo mangles.)
You can make this a little faster by invoking the shell in batches.
find . -type f -exec sh -c 'for x; do
mv "$x" "${x%/*}/$(printf "%s\n" "${x##*/}" | sha1sum | cut -d" " -f1)";
done' _ {} +
In zsh, there's an easy way to match all the files in the current directory and its subdirectories recursively. The . glob qualifier restricts the matches to regular files, and D includes dot files.
for x in **/*(.D); do mv …; done
In bash ≥4, you can run shopt -s globstar and use **/* to match all files in the current directory and its subdirectories recursively. You'll need to filter regular files in the loop.
shopt -s globstar; GLOBIGNORE=".:.."
for x in **/*; do if [[ -f $x ]]; then mv …; done
x="-n"; echo "$x" treats the -n as an opiton and prints nothing, but x="-n "; echo "$x " prints -n with the trailing space.. Thinking about it, it makes sense, as "-n" resolves to a bare -n option, and "-n " doesn't... but echo doesn't have the special "--" option to protect from this..
Create a helper script /tmp/tmp.sh:
#!/bin/bash
mv "$1" $(echo "$1" | sha1sum | cut -f1 -d' ')
make it executable, then invoke it:
find . -type f -execdir /tmp/tmp.sh {} ";"
If you are using Bash 4+, you can do:
#!/bin/bash
shopt -s globstar
for fname in **/*; do
if [ -f "$fname" ]; then
mv ...
fi
doneFrom the Bash Hacker's Wiki:
There's a new shell option globstar. When enabled, Bash will perform recursive globbing on ** – this means it matches all directories and files from the current position in the filesystem, rather that only the current level.
ztest/b/ztest/b/ztest/b/ztest/b/ztest/b/ztest/b/ztest/b/ztest/b/ztest/b/ztest/b/ztest/b/ztest/b/ztest/b/ztest/b/ztest/b/ztest/b/ztest/b/ztest/b/ztest/b/ztest/b/ztest/b/ztest/b/ztest/b/ztest/b/ztest/b/ztest/b/ztest/b/ztest/b/ztest/b/ztest/b/z.... ... It doesn't crash, oddly enough... maybe it is somehow limited in the number of loop-de-loops it does...
This handles all whitespace ok...
set -f; IFS=
while read -r -d $'\0' fname ;do
mv ...
done < <(find . -type f -name '*' -print0)
set +f; IFS=$' \t\n' # you don't have to reset unless it effects subsequent code
echowill insert a newline at end of of output, so modifying the sha1sum output with respect to what you would expect for the bare string.