Linux Noob sheet

This is a basic command that i use.

I put it here for my reference ^_^

Networking

$ ifconfig -a // To see ALL INTERFACE in the host

$ route -n // To see the GATEWAY in numeric way

$ ifup eth0 // To enable eth0 interface

$ ifdown eth0 // To disable eth0 interface

$ netstat nutlp // Display listening tcp and udp ports. No PID

$ sudo netstat nutlp // Display PID, listening tcp and udp ports

$ netstat -ln // Display listening tcp and udp ports

$ dhclient eth0 // Network interface request IP from DHCP

$ ifconfig eth0 192.168.0.111 netmask 255.255.255.0 up // Set IP address

Utils

$ scrot myimage.png // To SCREENSHOT

$ wget // To download file

$ display a.jpg // View image. Install imagemagick

$ alias aliasname='bash commands' // Setting alias name for certain bash commands

Process

$ ps -A // show the process list

Install

$ ./configure && make && make install // Compile the source code of the program

$ dpkg -i pkg.deb // Install debian package

$ rpm -Uvh pkg.rpm // Install RPM package

Website

$ python -m SimpleHTTPServer // To up WEBSITE in fast way.

BASH

$ processname & // & will make a program run in the background

$ !! // Repeat last command

BASH Variable

$ env // Show environment variables

$ echo $NAME // Output value of $NAME variable

$ export NAME=value // Set $NAME to value

$ . ~/.bashrc // Declare variable in .bashrc files

$ locate -i filename // find the location of filename. U need to run "updatedb" command.

$ grep -i // Case insensitive search

JAVA

$ export JAVA_HOME=/usr/lib/jvm/java-8-oracle // Set JAVA path version 8 JRE

$ sudo update-alternatives --config java // Select different version of JAVA

$ java -version // To see the JAVA version used