Move to the directory you want to start chmodding files in and run the following:
Recursively set FILE permissions.
Written by
find . -type f -exec chmod 644 {} \;
Recursively set DIRECTORY permissions.
find . -type d -exec chmod 755 {} \;
*Note, obviously you can change the chmod number to whatever you want, 777, 600, etc.
I have had need of this multiple times in the past, just making a note of it here:
chmod -R g=u directory_name/
Aliases can be a great way to more easily remember an oddball command or to shorten a long command. Aliases are stored in your .profile or within a include file referenced from .profile.
A couple of quick examples before showing how to set them up:
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Another starter article to grow with my needs, we’ll start off with the shebang, or bang…or simply “!”. The first two commands I believe are the most useful and could be commonly used. Note that some of these can be a bit difficult to remember, we’ll also go over making aliases so we can use something a little easier to remember in a later article.
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Just a starter page that will grow as I find useful awk commands to share.
Convert Linux .txt to Windows .txt
Replace the end of a line with a carriage. Useful for converting .txt files from Linux to Windows.
awk 'sub("$", "\r")' linuxfile.txt > windowsfile.txt
Convert Windows .txt to Linux .txt
And the reverse. Useful for converting .txt files from Windows to Linux.
awk '{ sub("\r$", ""); print }' windowsfile.txt > linuxfile.txt
Ok, well thats a bit misleading. We won’t actually be using ‘cat’ but ‘pygmentize’ and its not perfect, but its better than 1 single color
This runs on Debian/Gentoo based Linux systems
apt-get update apt-get install pygmentize
Once thats been installed what I did was to make an alias in my .profile
alias pcat='pygmentize'
Make sure to reload your .profile if you’ve added your alias
cd ~ . .profile
Example cat and pcat outputs:
Script is meant to be used with other scripts in order to determine if it is the last day of the month. Useful for making sure a particular script runs at the end of the month. Just add a cron job that checks this every day at the time you would want your code run if it was indeed the last day of the month.
2 0 * * * /usr/bin/last-day-of-the-month.sh
#!/usr/bin/bash # last-day-of-the-month.sh # By: Scott Rowley # http://www.sudobash.net/ ######################################### TODAY=`/usr/local/bin/date +%d` TOMORROW=`/usr/local/bin/date +%d -d "1 day"` # See if tomorrow's day is less than today's if [ $TOMORROW -lt $TODAY ] then echo "Today is the last day of the month, running code..." /run/your/code fi exit 1
*Note – This is not an original sudobash.net article – credit goes completely to
http://www.gratisoft.us/sudo/man/1.8.0/sudo.man.html. But I know people use search engines on ‘sudo bash’ and end up here so why not provide the answer as well? 
SYNOPSIS
sudo [-D level] -h | -K | -k | -V sudo -v [-AknS] [-a auth_type] [-D level] [-g group name|#gid] [-p prompt] [-u user name|#uid] sudo -l[l] [-AknS] [-a auth_type] [-D level] [-g group name|#gid] [-p prompt] [-U user name] [-u user name|#uid] [command] sudo [-AbEHnPS] [-a auth_type] [-C fd] [-D level] [-c class|-] [-g group name|#gid] [-p prompt] [-r role] [-t type] [-u user name|#uid] [VAR=value] [-i | -s] [command] sudoedit [-AnS] [-a auth_type] [-C fd] [-c class|-] [-D level] [-g group name|#gid] [-p prompt] [-u user name|#uid] file ...
DESCRIPTION
sudo allows a permitted user to execute a command as the superuser or another user, as specified by the security policy. The real and effective uid and gid are set to match those of the target user, as specified in the password database, and the group vector is initialized based on the group database (unless the -P option was specified).
sudo supports a plugin architecture for security policies and input/output logging. Third parties can develop and distribute their own policy and I/O logging modules to work seemlessly with the sudo front end. The default security policy is sudoers, which is configured via the file /etc/sudoers, or via LDAP. See the PLUGINS section for more information.
The security policy determines what privileges, if any, a user has to run sudo. The policy may require that users authenticate themselves with a password or another authentication mechanism. If authentication is required, sudo will exit if the user’s password is not entered within a configurable time limit. This limit is policy-specific; the default password prompt timeout for the sudoers security policy is 5 minutes.
Security policies may support credential caching to allow the user to run sudo again for a period of time without requiring authentication. The sudoers policy caches credentials for 5 minutes, unless overridden in sudoers(5). By running sudo with the -v option, a user can update the cached credentials without running a command.
When invoked as sudoedit, the -e option (described below), is implied.
Security policies may log successful and failed attempts to use sudo. If an I/O plugin is configured, the running command’s input and output may be logged as well.
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In your PHP page add something like the following:
$variable = popen("path/to/script.sh", 'r');
while (!feof($variable)) {
echo fgets($variable);
flush();
ob_flush();
}
pclose($variable);
Then in your script you can echo the output like normal – though I recommend modifying it to spit out HTML like so:
while [ 1 ] do read CURRENT_ACCOUNT || break echo "Working with account $CURRENT_ACCOUNT...<br />"; done < list_of_accounts.txt
Then when you run the php page your webpage will be updated each time with the output of your script.sh until it is complete, then it will resume with the rest of your php code.
Get a date in the past and change the output format:
date +'%Y-%m-%d' -d "1 day ago" 2010-11-30
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