Commands using sort (800)

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Find directories under home directory with 777 permissions, change to 755, and list them on console

Don't save commands in bash history (only for current session)
Only from a remote machine: Only access to the server will be logged, but not the command. The same way, you can run any command without loggin it to history. ssh user@localhost will be registered in the history as well, and it's not usable.

Show interface/ip using awk
Interfaces like lo can be omitted from the beginning, there are probably better ways of doing this, i'm a noob at awk.

Check if a string is into a variable
Returns true (0) if the string is into $var, or false (1) if not.

create a .avi with many .jpg

Serve current directory tree at http://$HOSTNAME:8080/

Backup your LDAP
Simple way to backup your LDAP entries: put this line on your crontab. The -n switch identifies the dbnum you want to backup (alternatively you can use -b suffix. Check man slapcat for your personal switches)

Sort and count subjects of emails stuck in Exim queue

get absolute file path
Retrieve absolute path name from relative path

Function to output an ASCII character given its decimal equivalent
I've corrected the function. My octal conversion formula was completely wrong. Thanks to pgas at http://mywiki.wooledge.org/BashFAQ/071 for setting me straight. The new function is from pgas and is very fast.


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