deviousway

## tcpdump_ddos.txt

# -i $INTERFACE -v -n -c $Number_of _packets -w attack.log dst port 80
tcpdump -i eth0 -v -n -c 500 -w attack.log dst port 80
#After you can analise
tcpdump -nr attack.log |awk '{print $3}' |grep -oE '[0-9]{1,}.[0-9]{1,}.[0-9]{1,}.[0-9]{1,}' |sort |uniq -c |sort -rn
#show only Top-20
tcpdump -nr attack.log |awk '{print $3}' |grep -oE '[0-9]{1,}.[0-9]{1,}.[0-9]{1,}.[0-9]{1,}' |sort |uniq -c |sort -rn | head -20

## Pgsql user db creation
sudo -u postgres psql
sudo -u postgres createuser <username>
sudo -u postgres createdb <dbname>

sudo -u postgres psql
psql=# alter user <username> with encrypted password '<password>';

psql=# grant all privileges on database <dbname> to <username> ;

## plesk.txt
#Show email passwords.
/usr/local/psa/admin/sbin/mail_auth_view

## ffmpeg_swap_chanel.txt
ffmpeg -i $input -map_channel 0.1.1  -strict -2 $output

## ffmpeg_mkv_to_mp4.txt
for i in *mkv; do ffmpeg -i $i -vcodec copy -acodec copy $i.mp4; done

## sed_grep_replace
sed -i 's/oldstring/new string/g'

## exim_clean_queue
exim -bp | awk '/^ *[0-9]+[mhd]/{print "exim -Mrm " $3}' | bash
or
exim -bp | exiqgrep -i | xargs exim -Mrm

## Cat_File_Without_Comments.txt
cat $filename | egrep -v "^#"
or
cat $filename | egrep -v "(^#.*|^$)"

## lsof.txt
lsof -Pnl +M -i4 | grep LISTEN

## centos_static_ip.txt
 /etc/sysconfig/network-scripts/ifcfg-enp2s0
IPV6INIT=no
BOOTPROTO=static
DEVICE=enp2s0
ONBOOT=yes
UUID="ccea7d4f-855b-496e-945b-da7fe543b725"
IPADDR=104.193.150.10
NETMASK=255.255.255.248
GATEWAY=104.193.150.9

	# -i $INTERFACE -v -n -c $Number_of _packets -w attack.log dst port 80
	tcpdump -i eth0 -v -n -c 500 -w attack.log dst port 80
	#After you can analise
	tcpdump -nr attack.log \|awk '{print $3}' \|grep -oE '[0-9]{1,}.[0-9]{1,}.[0-9]{1,}.[0-9]{1,}' \|sort \|uniq -c \|sort -rn
	#show only Top-20
	tcpdump -nr attack.log \|awk '{print $3}' \|grep -oE '[0-9]{1,}.[0-9]{1,}.[0-9]{1,}.[0-9]{1,}' \|sort \|uniq -c \|sort -rn \| head -20
	sudo -u postgres psql
	sudo -u postgres createuser <username>
	sudo -u postgres createdb <dbname>

	sudo -u postgres psql
	psql=# alter user <username> with encrypted password '<password>';

	psql=# grant all privileges on database <dbname> to <username> ;
	#Show email passwords.
	/usr/local/psa/admin/sbin/mail_auth_view
	exim -bp \| awk '/^ *[0-9]+[mhd]/{print "exim -Mrm " $3}' \| bash
	or
	exim -bp \| exiqgrep -i \| xargs exim -Mrm
	cat $filename \| egrep -v "^#"
	or
	cat $filename \| egrep -v "(^#.*\|^$)"
	/etc/sysconfig/network-scripts/ifcfg-enp2s0
	IPV6INIT=no
	BOOTPROTO=static
	DEVICE=enp2s0
	ONBOOT=yes
	UUID="ccea7d4f-855b-496e-945b-da7fe543b725"
	IPADDR=104.193.150.10
	NETMASK=255.255.255.248
	GATEWAY=104.193.150.9