Tips N Tricks

HOW TO ASSIGN IP ADDRESS AND GATEWAY FROM COMMAND LINE IN LINUX

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Although, we have got a wonderful tool "NetworkManager" to manage our interface connection from GUI,but when we are using console then how to manage those interfaces and configuring them becomes a headache for a naive linux user.These are the following steps you should follow in order to configure your interface properly.
 

[user@linux:~]$ifconfig eth0 192.168.1.10 netmask 255.255.255.0 To add the default gateway in the routing table type -- [user@linux:~]$route add default gw 192.168.1.254 [user@linux:~]$route -n (to print the routing info table on terminal) or we can also use [user@linux:~]$netstat -anr

HOW TO ADD DNS SERVER ENTRY IN LINUX FROM COMMAND LINE

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[user@linux:~]$echo "nameserver 8.8.8.8" > /etc/resolv.conf

HOW TO FIND THE ARCHITECTURE OF YOUR SYSTEM

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[user@linux ~]$arch or [user@linux ~]$uname -m

USING SHRED TO COMPLETELY DESTROY UR SECRET DATA

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[user@linux ~]$shred -v -z -u <filename_to_be_shred> Here options are -v --> verbose -z --> zero fill on the last overwriting -u --> finally truncate ur file after overwriting

SOME INTERESTING OPTIONS OF DATE NOT GIVEN IN MAN BUT IN INFO

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This is GNU date, and you won't find these options in "man date" - you have to use "info date" (or "pinfo date" ).

[user@linux ~]$date -d yesterday [user@linux ~]$date --date=yesterday [user@linux ~]$date -d '2 days ago'

HOW TO CHANGE MAC ADDRESS IN LINUX FROM TERMINAL

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[user@linux ~]$ifconfig eth0 down hw ether 00:11:1a:2b:3c:33 (give the new ethernet address) [user@linux ~]$ifconfig eth0 up

To restore the original MAC address give the following commands : -

[user@linux ~]$ifconfig eth0 down [user@linux ~]$ifconfig eth0 up

HOW TO INSTALL FONTS IN THE LINUX

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Copy and paste the fonts you want to install inside the /usr/share/fonts as follows .Here 
fc-cache scans the font directories  on  the  system  and  builds  font information  cache
files  for  applications using fontconfig for their  font handling.

[user@linux:~]#sudo cp /home/user/fonts/* /usr/share/fonts/ [user@linux:~]#sudo fc-cache -f -v