Alter "AddHandler php5-cgi .php" and "AddHandler php4-cgi .php" entries to new "AddHandler x-httpd-php5 .php" respective php4 entries in all .htaccess files under /var/www

The `-q' arg forces tail to not output the name of the current file

Character: "?" is the Byte Order Mark (BOM) of the Unicode Standard.

Specifically it is the hex bytes EF BB BF, which form the UTF-8 representation of the BOM,

misinterpreted as ISO 8859/1 text instead of UTF-8.

I used this to copy all PDFs recursively to a selected dir

Using a GUI file managers you can merge directories (cut and paste). This command roughly does the same (it doesn't ask for confirmation (no problem for me) and it doesn't clean up the empty SRC directories (no problem, trivial).

probably does the same:

diff is designed to compare two files. You can also compare directories. In this form, bash uses 'process substitution' in place of a file as an input to diff. Each input to diff can be filtered as you choose. I use find and egrep to select the files to compare.

Best to put it in a file somewhere in your path. (I call the file spath)

#!/bin/bash

IFS=:; find $PATH | grep $1

Usage: $ spath php

This command will find the biggest files recursively under a certain directory, no matter if they are too many. If you try the regular commands ("find -type f -exec ls -laSr {} +" or "find -type f -print0 | xargs -0 ls -laSr") the sorting won't be correct because of command line arguments limit.

This command won't use command line arguments to sort the files and will display the sorted list correctly.

-exec works better and faster then using a pipe

Simple command to convert a large number of images into jpeg-format. Will delete originals after conversion.

xargs -P N spawns up to N worker processes. -n 40 means each grep command gets up to 40 file names each on the command line.

I used this because I needed to sort the content of a bunch of gzipped log files. Replace sort with something else, or simply remove sort to just rezip everything

this will show the names of the deleted directories, and will delete directories that only no files, only empty directories.

A quick way to find and delete empty dirs, it starts in the current working directory.

If you do find . -empty -type d you will see what could be removed, or to a test run.

Calculates md5 sum of files. sort (required for uniq to work). uniq based on only the hash. use cut ro remove the hash from the result.

Only tested on Linux Ubunty Hardy. Works when file names have spaces. The "-maxdepth 2" limits the find search to the current directory and the next one deeper in this example. This was faster on my system because find was searching every directory before the current directory without the -maxdepth option. Almost as fast as locate when used as above. Must use double quotes around pattern to handle spaces in file names. -print0 is used in combination with xargs -0. Those are zeros not "O"s. For xargs, -I is used to replace the following "{}" with the incoming file-list items from find. Echo just prints to the command line what is happening with mv. mv needs "{}" again so it knows what you are moving from. Then end with the move destination. Some other versions may only require one "{}" in the move command and not after the -I, however this is what worked for me on Ubuntu 8.04. Some like to use -type f in the find command to limit the type.

A simple "ls" lists files *and* directories. So we need to "find" the files (type 'f') only.

As "find" is recursive by default we must restrict it to the current directory by adding a maximum depth of "1".

If you should be using the "zsh" then you can use the dot (.) as a globbing qualifier to denote plain files:

zsh> ls *(.) | wc -l

for more info see the zsh's manual on expansion and substitution - "man zshexpn".

use find to grep all .c files from the target directory, cat them into one stream, then piped to wc to count the lines

Find Word docs by filename in the current directory, convert each of them to plain text using antiword (taking care of spaces in filenames), then grep for a search term in the particular file.

(Of course, it's better to save your data as plain text to make for easier grepping, but that's not always possible.)

Requires antiword. Or you can modify it to use catdoc instead.