File Operations
pwd Print Name Of Current/Working Directory
cd Changing The Working Directory
cp Copy Files Or Directory
rm Remove Files And Directory
ls List Of Directory Contents
mkdir Make Directory
cat Concatenate Files And Print On Standard Output
mv Move Files
chmod Change Files Permissions
Know Your System
uname Print System Information
who Show Who Is Logged On
cal Displays Calculator
date Print System Date And Time
df Report File System Disk Space Usage
du Estimate File Space Usage
ps Displays Information Of Current Active Processes
kill Allows To Kills Process
clear Clear The Terminal Screen
cat /proc/cpuinfo Cpuinfo Display CPU Information
cat /proc/meminfo Display Memory Information
Compression
tar Store and Extract Files From An Archive File
gzip Compress Or Decompress Named Files
Network
ifconfig To Config Network Interface
ping Check Other System are reachable from The Host System
wget Download Files From Network
ssh Remote Login Program
ftp Download/Upload Files From/To Remote System
last Displays List Of Last Logged In User
telnet Used To Communicate With Another Host Using THe Telnet Protocol
Searching Files
grep Search Files(s) For Specific Text
find Search For Files In A Directory Hierarchy
locate Find Files By Name
and then on Computer. 
