How to create password protected folder in linux

htpasswd -c /var/www/folder_name/.htpasswd <username>

Should be prompted with new password

How to change default IDE of Ubuntu

Change default nano editor to vim

sudo update-alternatives –config editor

then…select vim

:q == Close Vi

:wq == Save and Close Vi

:vim -p file1.php file2.sh === Open multiple file

:tabn === Switch to Next Tab

:tabp === Switch to Previous Tab

:tabc === Close current tab

:set nu == Show line number

:set nu! === Hide line number

Jul 9 2010

At boot wait for Grub menu

1. Press “a“

2. Choose the second line

kernel /vmlinuz-2.6.9-1.667 ro root=LABEL=/

3. Add acpi=on rhgb quiet 3 at the end

kernel /vmlinuz-2.6.9-1.667 ro root=LABEL=/ acpi=on rhgb quiet 3

4. After edit… press “b” to reboot

5. then youre done … ^_^

How to install :

# apt-get install <app_name>

How to remove :

#apt-get remove –purge <app_name>
#apt-get clean

Note:

<app_name> must be exactly the same from install to remove the application