commandlinefu.com is the place to record those command-line gems that you return to again and again.
Delete that bloated snippets file you've been using and share your personal repository with the world. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.
If you have a new feature suggestion or find a bug, please get in touch via http://commandlinefu.uservoice.com/
You can sign-in using OpenID credentials, or register a traditional username and password.
First-time OpenID users will be automatically assigned a username which can be changed after signing in.
Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.
» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10
Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):
Subscribe to the feed for:
When downloading files on a Mac, Apple adds the x-attribute: com.apple.quarantine. Often, this makes it so you can't even run a ./configure. This command gets rid of the quarantine for all files in the current directory.
works only in zsh, requires EXTENDED_GLOB to be set.
Find files matching multiple descriptions (*.c and *.cpp) excluding multiple directories (unit-test and android).
When I do a major change in my entities, I want to find a way to find all my Entities names and create the commande for me.
So instead of doing ls src/Your/OwnBundle... and then do it manually, this helps a lot.
Search for files and list the 20 largest.
find . -type f
gives us a list of file, recursively, starting from here (.)
-print0 | xargs -0 du -h
separate the names of files with NULL characters, so we're not confused by spaces
then xargs run the du command to find their size (in human-readable form -- 64M not 64123456)
| sort -hr
use sort to arrange the list in size order. sort -h knows that 1M is bigger than 9K
| head -20
finally only select the top twenty out of the list
This command find which of your zip (or jar) files (when you have lots of them) contains a file you're searching for. It's useful when you have a lot of zip (or jar) files and need to know in which of them the file is archived.
It's most common with .jar files when you have to know which of the .jar files contains the java class you need.
To find in jar files, you must change "zip" to "jar" in the "find" command. The [internal file name] must be changed to the file name you're searching that is archived into one of the zip/jar files.
Before run this command you must step into the directory that contains the zip or jar files.
Improvement on Coderjoe's Solution. Gets rid of grep and cut (and implements them in awk) and specifies some different mplayer options that speed things up a bit.
This can be used to delete or archive old mails. In fact, for archiving its a bit different, you need to archive mails with any tools (e.g archivemail), and then deleting (if you want!).
Here we use -path ".*/cur/*" to avoid files limit in bash globbing and to search in any inbox (e.g .mymail .spam .whatever).
! -newermt "1 week ago" can be read: All files which is older than "1 week ago", adapt it in consequence.
This let me find some a set of modifications that were made to a rather large tree of files, where the file-names themselves were not unique (actually: insanely redundant and useless. "1.dat 2.dat ..."). Pruning down to last-branch brough things back to the "project-name" scope, and it's then easy to see which branches of the tree have recently changed, or any other similar search.
Ideally, it should sort the directories by the mtime of the most recent *file* *inside* the directory, but that's probably outside the scope of a (sane...) command line.
Sometimes, you don't want to just replace the spaces in the current folder, but through the whole folder tree - such as your whole music collection, perhaps. Or maybe you want to do some other renaming operation throughout a tree - this command's useful for that, too.
To rename stuff through a whole directory tree, you might expect this to work:
for a in `find . -name '* *'`;do mv -i "$a" ${a// /_};done
No such luck. The "for" command will split its parameters on spaces unless the spaces are escaped, so given a file "foo bar", the above would not try to move the file "foo bar" to "foo_bar" but rather the file "foo" to "foo", and the file "bar" to "bar". Instead, find's -execdir and -depth arguments need to be used, to set a variable to the filename, and rename files within the directory before we rename the directory.
It has to be -execdir and won't work with just -exec - that would try to rename "foo bar/baz quux" to "foo_bar/baz_quux" in one step, rather than going into "foo bar/", changing "baz quux" to "baz_quux", then stepping out and changing "foo bar/" into "foo_bar/".
To rename just files, or just directories, you can put "-type f" or "-type d" after the "-depth" param.
You could probably safely replace the "mv" part of the line with a "rename" command, like rename 'y/ /_/' *, but I haven't tried, since that's way less portable.
Just want to post a Perl alternative.
Does not count hidden files ('.' ones).
Applies each file operator using the built-in test.
testt /home/askapache/.sq
/home/askapache/.sq
-a True - file exists.
-d True - file is a directory.
-e True - file exists.
-r True - file is readable by you.
-s True - file exists and is not empty.
-w True - the file is writable by you.
-x True - the file is executable by you.
-O True - the file is effectively owned by you.
-G True - the file is effectively owned by your group.
-N True - the file has been modified since it was last read.
Full Function:
testt ()
{
local dp;
until [ -z "${1:-}" ]; do
dp="$1";
[[ ! -a "$1" ]] && dp="$PWD/$dp";
command ls -w $((${COLUMNS:-80}-20)) -lA --color=tty -d "$dp";
[[ -d "$dp" ]] && find "$dp" -mount -depth -wholename "$dp" -printf '%.5m %10M %#15s %#9u %-9g %#5U %-5G %Am/%Ad/%AY %Cm/%Cd/%CY %Tm/%Td/%TY [%Y] %p\n' -a -quit 2> /dev/null;
for f in a b c d e f g h L k p r s S t u w x O G N;
do
test -$f "$dp" && help test | sed "/-$f F/!d" | sed -e 's#^[\t ]*-\([a-zA-Z]\{1\}\) F[A-Z]*[\t ]* True if#-\1 "'$dp'" #g';
done;
shift;
done
}
You must have the android sdk installed with 'adb' executable on your system. This is just a way to loop over files in a folder using 'find' to locate and install android apps.
Output of this command is the difference of recursive file lists in two directories (very quick!).
To view differences in content of files too, use the command submitted by mariusbutuc (very slow!):
diff -rq path_to_dir1 path_to_dir2
Finally, we can make the file "unchangeable"
sudo chattr +i
Find all files under "." that are invalid NTFS filenames. Find locates all files, and grep shows the invalid ones.
Find is used to "find" all filenames - grep shows those that are invalid.
I use this find command example to find out all the executable files you can modify it to find readonly file as well.
This command does a basic find with size. It also improves the printout given (more clearer then default)
Adjusting the ./ will alter the path.
Adjusting the "-size +100000k" will specify the size to search for.
you can find a special things(with defined -iname "*sql*") from in most of one direcroty(for example from both /etc/ and /pentest/) and then you can want to grep only include "map" word
you can find all "trace" phrases within everywhere else under the pentest directory..