Linux Bash Commands

for each file in a directory

for a in $(ls -1 *.tar.gz); do echo $a; done

tailf output weiternutzen

function mailIPs {
  tailf /var/log/mail.log | grep --line-buffered "postfix-in" | grep --line-buffered " connect from" | grep --line-buffered -Eo "[[:digit:]]{1,3}\.[[:digit:]]{1,3}\.[[:digit:]]{1,3}\.[[:digit:]]{1,3}";
}
 
function handleLine {
  OUT=$(wget -qO- --user-agent="Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)" "http://api.hostip.info/get_json.php?position=true&ip=$1" 2>&1);
  echo $OUT;
}
 
mailIPs | while read -r line; do handleLine $line  ; done

hping3 SYN Flood

Um zu überprüfen wie ein Programm auf eine SYN-Paket Flut reagiert kann dieser Befehl genutzt werden:

hping3 -S --flood -p <PORT> -V <HOST>

iPerf

jPerf (Java GUI)
Server

iperf -s -P 0 -i 1 -p 5001 -f k

Client

iperf -c 128.53.2.25 -P 10 -i 1 -p 5001 -f M -t 10

-P 10 Parallell streams; -t 10 Transmit in seconds (-n as Bytes)

Recursive Directory Size - Sorted - Treesize

du -h /home | sort -h

Zeitraffer oder Diashow mit ffmpeg

ffmpeg -r 30 -i input%03d.jpg -codec copy output.mkv

Grep in tar.gz (tgzgrep)

function tgzgrep { rm -R /tmp/tgzgrep > /dev/null; mkdir /tmp/tgzgrep; tar -C /tmp/tgzgrep -xzf $2; grep -i "$1" /tmp/tgzgrep/*; }

function mailgrep { rm -R /tmp/mailgrep; mkdir /tmp/mailgrep; tar -C /tmp/mailgrep -xzf 2013-03-20.mailarchive-in.tar.gz; grep -i "$@" /tmp/mailgrep/*; }

Check Postfix Maillog IPs with DNSBL

tac /var/log/mail.log | egrep "postfix-in(.*)client" | egrep -o "([0-9]{1,3}\.){3}[0-9]{1,3}" | head -n 5 | while read line ; do ./check_dnsbl.sh -H $line ; done

Run command aganst reqursive filelist

find ./ -type f -print0 | while read -d $'\0' -r file ; do
  md5sum "$file" | grep --line-buffered --only-matching -m 1 '^[0-9a-f]*' | sort
done

Test Webserver

Antwortet mit Test-Server und dem aktuellen Datum

while true; do { echo -e 'HTTP/1.1 200 OK\r\nContent-Type: text/html\r\n'; echo 'Test-Server'; date; } | nc -l 64682; done

pub/linux-bash-commands.txt · Zuletzt geändert: 2018/11/16 08:13 von Marco Krage

electronical Brain