Basic Linux Commands On Terminal

Change Directory

cd file_dir

Create Directory

mkdir file_dir

Delete Directory 

rm -rf file_dir

Create/Write File

nano my_file.txt (from nano editor)

vi my_file.txt (from vi editor)

vim my_file.txt (from vim editor)

Delete File 

rm my_file.txt

View File

cat my_file.txt

View Zip File content

zcat /tmp/excise_1/ivr-2.log.gz

Get File Properties

file my_file.txt

Show only log entries which contain text field

cat /var/log/audit.log | grep Error

Rename File / Move File

mv my_file_oll.txt my_file_new.txt

Copy File

cp my_file.txt /tmp/

Copy Directory

cp -r /tmp/dir /home/new_dir

SSH 

ssh username@ip

ssh global_info_portal@192.234.87.87

SCP

scp filename username@ip:/server_location

scp /tmp/my_file.txt global_info_portal@192.234.87.87:/tmp

Disk Space

df -h

Ram Detail

free -m

View Process

top

Kill process

kill -9 process_id

when using top command its second column number is process id.

kill -9 1998

Download File

curl http://example.com --output my.file