Search Commands

File Operations

ls

List directory contents

ls -la

cp

Copy files and directories

cp file.txt backup/

mv

Move or rename files and directories

mv old.txt new.txt

rm

Remove files or directories

rm -rf directory/

mkdir

Create directories

mkdir -p parent/child

touch

Create empty files or update timestamps

touch newfile.txt

Navigation

cd

Change the current directory

cd /home/user/documents

pwd

Print working directory

pwd

find

Search for files in a directory hierarchy

find . -name "*.txt"

locate

Find files by name

locate filename

Process Management

ps

Report a snapshot of current processes

ps aux

top

Display Linux processes

top

kill

Terminate processes

kill -9 1234

nice

Run a program with modified scheduling priority

nice -n 10 command

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Text Processing

grep

Search for patterns in files

grep "pattern" file.txt

sed

Stream editor for filtering and transforming text

sed 's/old/new/g' file.txt

awk

Pattern scanning and processing language

awk '{print $1}' file.txt

cat

Concatenate and display files

cat file.txt

Networking

ping

Send ICMP ECHO_REQUEST to network hosts

ping google.com

ifconfig

Configure network interface parameters

ifconfig eth0

netstat

Print network connections, routing tables, etc.

netstat -tuln

ssh

OpenSSH SSH client (remote login program)

ssh user@hostname