netstat - network statistics

netstat is a command displays statistics on all network activities.

main options:

-a Displays all active ports

-n Numerical display of addresses and port numbers

-o Displays the process identifiers (PID)

| grep 11753 - displays information only for IP 11753 (or other filter)

netstat -a -n | grep 11753

SAP ASE (Sybase) - set environment variables from SYBASE.sh in Unix

. SYBASE.sh

(instead of 
source SYBASE.sh
)

AIX - CPU, memory and IO (disks space) commands

CPU usage for each process:
topas –P

CPU details:
mpstat

Memory details:
vmstat
svmon

Disk IO details:
iostat
topas -D 

Connect to isql

isql Uusername Ppassword [Sserver]

(U , P , S - as is and then replace to the user, password, ...)
( Pay attention: names are case-sensitive )

Unix/Linux zip commands

zip file: 
zip FILENAME.ZIP

unzip file: 
unzip FILENAME.ZIP

unzip to a folder: 
unzip FILENAME.ZIP -d FOLDERNAME

instsall zip:
sudo apt install zip

Unix/Linux files commands

remove a file
rm
(rm * - remove all files in the folder)
(-f - force deletion)

find a file in a folder including sub-folders by it's name:
find -name FILENAME
find a file in a folder including sub-folders by part of it's name:
find -name FILEN*

view text of a file
more FILENAME

• Exit by pressing q key

edit a file
vi FILENAME

• To save a file: press Esc key, type :w, Enter
• To save a file and quit: press Esc key, type :x, Enter

grant privilege to a user
chown -R USERNAME: FOLDERNAME
(-R - to recursively operate on all files and directories under the given directory)

Unix/Linux System and enviroment commands

show enviroment parameters
env
show enviroment parameters results match a specified pattern
env | grep STRING

add parameter to env or replace exists value:
export PARAM="VALUE"
concantanete value to exists parameter in env:
export PARAM="VALUE":$PARAM

available and used disk space usage
df
(df -h - more human display)

Unix/Linux basic commands

where I am
pwd

go to FOLDERNAME folder
cd FOLDERNAME

go to parent folder
cd ..

display what is in the folder
ls
(-l all files)
(- la all include hidden)

create a folder
mkdir FOLDERNAME

display an user manual for a command
man COMMAND

switch user
su

run a command like admin (= "as administrator" in windows)
sudo COMMAND ...

desplay results that match a specified pattern
COMMAND | grep STRING

show commands history
history