Log in as root and type the following # arping -D -I eth0 -c 2 10.5.70.2 ARPING 10.5.70.2 from 0.0.0.0 eth0 Unicast reply from 10.5.70.2 [00:02:55:C7:1D:49] for 10.5.70.2 [00:02:55:C7:1D:49] 4.222ms Sent 1 probes (1 broadcast(s)) Received 1 response(s) [root@govath-pc ~]# echo $? 1

Configure Pidgin . Do Ctrl+A to open the ‘Accounts’ window, then ‘Add’. On the ‘Basic’ tab, select the XMPP Protocol. Username: Your Facebook username Domain: chat.facebook.com Resource: Pidgin Password: your Facebook password Local alias: Alias On the Advanced tab, then enter the following: Connect port: 5222 Connect server: chat.facebook.com Uncheck ‘Require SSL/TLS’ You’re now set

Some Basic examples of setting permissions to Files. Granting an additional user read access $ setfacl -m u:lisa:r file Revoking write access from all groups and all named users (using the effective rights mask) $ setfacl -m m::rx file Removing a named group entry from a file’s ACL $ setfacl -x g:staff file Copying the

Linux disable screen blanking i.e. preventing screen going blank It is easy to disable screen saver under X window. But when it comes to text based login or terminal you will not find easy way to disable text based power saving mode (i.e. when your screen goes blank after a few minutes). So how do

NAME du – estimate file space usage SYNOPSIS du [OPTION]… [FILE]… DESCRIPTION Summarize disk usage of each FILE, recursively for directories. Mandatory arguments to long options are mandatory for short options too. -a, –all write counts for all files, not just directories -B, –block-size=SIZE use SIZE-byte blocks -b, –bytes print size in bytes -c, –total