omar-yassin

export PS1='\e[1;35m\u\e[m@\h:\e[1;31m\w\e[m\n\$ '

omar-yassin

cat json.file | python -m json.tool | less

omar-yassin

git clone --no-hardlinks path/to/file.git

omar-yassin

#!/bin/bash

#TO RUN
# > ./dns_spf_expander.sh domain.com

lookup_count=0
function spf_expand {
	for spf in $1 ; do
		if echo $spf | grep "include:" > /dev/null 2>&1 ; then
			((lookup_count++)) 

omar-yassin

validate score of email via: 
	http://www.mail-tester.com/
	email  [email protected] (will send email report)

validate SPF synatx with: 
	http://www.kitterman.com/spf/validate.html?

gapps validator:
	https://toolbox.googleapps.com/apps/checkmx/

omar-yassin

> show binary logs;
> purge binary logs to 'filename';

omar-yassin

ADD RULE with PORT and IPADDRESS
	sudo iptables -A INPUT -p tcp -m tcp --dport port_number -s ip_address -j ACCEPT

ADD RULE for PORT on all addresses
	sudo iptables -A INPUT -p tcp -m tcp --dport port_number --sport 1024:65535 -j ACCEPT

DROP IPADRESS
	sudo iptables -I INPUT -s x.x.x.x -j DROP

VIEW IPTABLES with rule numbers

omar-yassin

echo "3/2+1" | bc -l

omar-yassin

git init; git add .; git commit #current directory

git fetch path/to/repo master:whatever-branch-name-you-want

git merge whatever-branch-name-you-want

omar-yassin

postqueue -p                #read queue headers
postcat -q #{message_id}    #read message
postsuper -d ALL deferred   #delete deferred