I spent a lot of time figuring out how to upgrade my PEAR package.
The trick is to install the PEAR package with –force to make it go through

# pear upgrade --force PEAR

cat myawk.sh
#!/bin/sh
# list the type of files with count
find ${*-.} -type f -print | xargs file |
awk '{
$1=NULL;
t[$0]++;
}
END {
for (i in t) printf("%d\t%s\n", t[i], i);
}' | sort -nr

ps aux
When you run ps you will only get the first 40 or so characters displayed. In order to view the entire string, use ...
ps auxgww

If you're a Linux expert, Fedora is for you. If you just want a good, general-purpose desktop for home or work, then openSUSE is your best pick. And if you're new to Linux, and your computer gets along well with Ubuntu, Ubuntu is still a good choice.
Knoppix if you want to use Linux off a live CD and puppy linux is for everyone!!

You can enter the "kill" command in a terminal if a process hangs.
kill ID
kill -9 ID
pkill firefox

You can switch to a virtual terminal using Ctrl + Alt + F1 if the user interface does not allow you to start the terminal.
This should hopefully restore some sanity to your computer and you can switch back to the GUI using Ctrl + Alt + F7

behave mswin - Copy and Paste with Ctrl+C CtrlV
set laststatus=2 - grey status bar at the bottom
syntax on - syntax highlighting
set autoindent - auto indenting
set number - line numbers
set showcmd - show command in status line
set showmatch - show matching brackets
set ignorecase - do case insensitive matching
set hlsearch - highlight what you search for

HashKnownHosts no
Add the above line in your ssh_config file that can be found here....
/etc/ssh/ssh_config

The safe way to change IFS in a 'while read' loop is:

while IFS=\| read a b c
do
: whatever
done

output redirection using n> usually overwrites existing files. You can control this with the noclobber option of the set builtin. If it has been set, you can override it using n>|

$ set -o noclobber
$ ls x* z* >stdout.txt 2>stderr.txt
-bash: stdout.txt: cannot overwrite existing file
$ ls x* z* >|stdout.txt 2>|stderr.txt
$ set +o noclobber

The following command can be used to send messages to remote servers.

ssh -X root@123.123.123.123 'DISPLAY=:0 notify-send "TEST MESSAGE."'

The command that actually sends the message is...
notify-send "hi vandana"