helpful commands

LINUX COMMANDS :

 how many apache connections

netstat -an | grep 80 | wc -l 

 check how many sessions on apache

 while true ; do ls /tmp/sess_* | wc -l ; sleep 1; done

 how many conn for each ip

netstat -ntu | awk ' $5 ~ /^(::ffff:|[0-9|])/ { gsub("::ffff:","",$5); print $5}' | cut -d: -f1 | sort | uniq -c | sort -nr  

zip -9 -r zipfile.zip directory

lsof -i -n -P ==> check opened ports 

for listname in $(ls *.xls | sed "s/\./_/"| sed "s/\s/_/" | sed "s/xls/py/"); do touch $listname; done 

#!/bin/bash
for i in $(ls -d $PWD/*.py | grep -v __init); do sed -e "s/\(^\s*'.*'\s*:\)/\L\1/g" $i > $i.lower ; done 
for i in $(ls -d $PWD/*.py | grep -v __init); do  mv $i $i.tmp ; done 
for i in $(ls -d $PWD/*.py.lower | grep -v __init); do mv $i $PWD/$(basename $i .lower) ; done