tests

echo $PATH

VAR1="test"
export VAR1
export VAR2="test2"
bash 
echo $VAR1
echo $VAR2

ping -i 0.2 google.com | grep time
ip a  | grep inet | grep -v inet6 | awk '{print $2}' | tail -n1 | cut -d'/' -f1

cat < /etc/passwd > passw
cat < /etc/group >> passw

# signals
ping google.com
^Z
ps aux | grep [g]oogle.com | awk '{print $2, $8}'
kill -18 PINGPID

ls -l > output &
cat output

ls -l  > output && echo 'success' || echo 'fail'
ls -l NONE_EXISTANT_FILE > output && echo 'success' || echo 'fail'


cd /tmp
pwd 

ulimit -a #list current limits
ulimit -n 1
cat > sdaasdasd 

ulimit -u 1
ls

ulimit -n 1
cat > sdaasdasd 

bash# ./shell
0: exit 10
bash# echo $? #should write 10

type -a pwd
pwd is a shell builtin
pwd is /bin/pwd

nice -n 10 ping google.com > /dev/null &
ps ax -o pid,ni,cmd | awk '/[g]oogle.com/ {print $2}'