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Useful mainly for debugging or troubleshooting an application or system, such as X11, Apache, Bind, DHCP and others. Another useful switch that can be combined with -mmin, -mtime and so forth is -daystart. For example, to find files that were modified in the /etc directory only yesterday:
$ sudo find /etc -daystart -mtime 1 -type f
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"
Great for watching things like Maildir's or any other queue directory.
Then you can remove the specific entry:
iptables -D INPUT 10
Just make sure these are set:
IPTABLES_SAVE_ON_STOP="yes"
IPTABLES_SAVE_ON_RESTART="yes"
Else your changes won't stick when you restart iptables.
If you want to turn a Git repo into the origin that folks can push to, you should make it a bare repository. See: http://stackoverflow.com/questions/2199897/git-convert-normal-to-bare-repository
This pipeline will find, sort and display all files based on mtime. This could be done with find | xargs, but the find | xargs pipeline will not produce correct results if the results of find are greater than xargs command line buffer. If the xargs buffer fills, xargs processes the find results in more than one batch which is not compatible with sorting.
Note the "-print0" on find and "-0" switch for perl. This is the equivalent of using xargs. Don't you love perl?
Note that this pipeline can be easily modified to any data produced by perl's stat operator. eg, you could sort on size, hard links, creation time, etc. Look at stat and just change the '9' to what you want. Changing the '9' to a '7' for example will sort by file size. A '3' sorts by number of links....
Use head and tail at the end of the pipeline to get oldest files or most recent. Use awk or perl -wnla for further processing. Since there is a tab between the two fields, it is very easy to process.
$ time perl -e 'if(opendir D,"."){@a=readdir D;print $#a - 1,"\n"}'
205413
real 0m0.497s
user 0m0.220s
sys 0m0.268s
$ time { ls |wc -l; }
205413
real 0m3.776s
user 0m3.340s
sys 0m0.424s
*********
** EDIT: turns out this perl liner is mostly masturbation. this is slightly faster:
$ find . -maxdepth 1 | wc -l
sh-3.2$ time { find . -maxdepth 1|wc -l; }
205414
real 0m0.456s
user 0m0.116s
sys 0m0.328s
** EDIT: now a slightly faster perl version
$ perl -e 'if(opendir D,"."){++$c foreach readdir D}print $c-1,"\n"'
sh-3.2$ time perl -e 'if(opendir D,"."){++$c foreach readdir D}print $c-1,"\n"'
205414
real 0m0.415s
user 0m0.176s
sys 0m0.232s
