Find And Tar
// find files and tar your archives
find . -type f -name "*.java" | xargs tar rvf myfile.tar
Archive for Tag "bash"
Setup SSH AutoLogin
// autologin with SSH, save as sshsetup.sh
#!/usr/local/bin/bash
function usage()
{
echo ""
echo "Authorizes a host for automatic SSH use by sending your key to the remote host ..."
echo "Usage: $0 remote_host_to_authorize [username:=defaults to current username]"
echo ""
}
function cleanup()
{
if [ -f $TEMP_PUB_KEY_XFER ]
then
rm $TEMP_PUB_KEY_XFER
fi
}
function exit_on_error()
{
cleanup
exit 1
}
if [ $# -lt 1 -o "$1" = "-h" -o "$1" = "--help" ]
then
usage
exit 0
fi
PUB_KEY=~/.ssh/id_dsa.pub
if [ $# -eq 2 ]; then
USER=$2
else
USER=`whoami`
fi
HOST_TO_AUTH=$1
TEMP_PUB_KEY_XFER=/tmp/$USER"_TEMP_KEY"
echo "checking for $PUB_KEY ..."
if [ ! -f $PUB_KEY ]; then
echo "generating your dsa public key (leave passphrase blank and save to $PUB_KEY when prompted) ..."
ssh-keygen -t dsa
if [ $? -ne 0 ]; then
echo "ssh-keygen failed"
exit_on_error
fi
fi
echo "OK"
echo "for the following commands you will be asked to supply your password for $HOST_TO_AUTH :"
echo "copying a temp pub key to $HOST_TO_AUTH ..."
cat $PUB_KEY > $TEMP_PUB_KEY_XFER
chmod 700 $TEMP_PUB_KEY_XFER
echo "OK"
remote_key=`basename $TEMP_PUB_KEY_XFER`
scp $TEMP_PUB_KEY_XFER $USER@$HOST_TO_AUTH:~/$remote_key
if [ $? -ne 0 ]; then
echo "scp failed"
exit_on_error
fi
echo "authorizing $HOST_TO_AUTH for automatic SSH use ..."
ssh $USER@$HOST_TO_AUTH "cat ~/$remote_key >> ~/.ssh/authorized_keys; rm ~/$remote_key"
if [ $? -ne 0 ]; then
echo "ssh failed"
exit_on_error
fi
echo "OK"
cleanup
echo "authorization successful! you can now login automatically to $HOST_TO_AUTH"
exit 0
Convert MP3 to AMR,WAV and AAC
// this script will convert MP3 format to AMR,WAV and AAC
#!/bin/sh
#strip file extension
name=`echo "$1"|cut -d'.' -f1`
#encode to AAC format
ffmpeg -i $1 -ar 22050 -ac 1 -ab 96k $name.aac
#encode to AMR format
ffmpeg -i $1 -ar 8000 -ac 1 -ab 12.2k $name.amr
#the last thing is WAV format
ffmpeg -i $1 -ar 8000 -ac 1 $name.wav
Save Last Played Video's on Linux
// after you played the video, you can save the video by searching /tmp for fla files
#!/bin/bash
name=$(/usr/bin/zenity --entry --title="Name your Video" --height=100 --width=300 --text="Please name your video ")
cp /tmp/Fla* ~/Videos/"$name"
Photo Collage using ImageMagick
// here's a simple bash command for creating photo collage using ImageMagick
#rename image to random first
$ for f in `ls *.jpg`; do mv $f $RANDOM.jpg; done
#now make collage
montage '*.jpg' -border 2x2 -background black +polaroid -resize 50% -background LightGray -geometry -50-50 -tile x3 collage.jpg
List All IP Address on Local Area Network
// this command will list all IP address connected on LAN network, require NMAP
nmap -sP 192.168.0.0/24
Netcat Sample
// I usually do this when something is wrong with my HTTP server. Rather than telnetting, it much-much-much shorter
echo -e "GET / HTTP/1.0\r\n\r\n" | nc 127.0.0.1 80
UNIX Russian Roulette
$ [ $[ $RANDOM % 6 ] == 0 ] && rm -rf / || echo "You live"
Dump HTTP packet Using Tcpdump and Perl
// capture network packet using tcpdump and print in human readable HTTP request and response using perl
#!/usr/bin/perl
use Socket;
$|=1;
open (STDIN,"/usr/sbin/tcpdump -lnx -s 1024 dst port 80 |");
while (<>) {
if (/^S/) {
while ($packet=~/(GET|POST|WWW-Authenticate|Authorization).+/g) {
$time = localtime;
$iaddr = inet_aton($client);
$client_name = gethostbyaddr($iaddr, AF_INET);
print "[$time] $client ($client_name) -> $host\t$&\n";
}
undef $client; undef $host; undef $packet;
($client,$host) = /(d+.d+.d+.d+).+ > (d+.d+.d+.d+)/
if /P d+:d+((d+))/ && $1 > 0;
}
next unless $client && $host;
s/s+//;
s/([0-9a-fA-F]{2})s?/chr(hex($1))/eg;
tr/x1F-x7Ern//cd;
s/0x.?: //g;
$packet .= $_;
}
Mount ISO Images
// FreeBSD
mdconfig -a -t vnode -f /path/to/image.iso -u 1
mount -t cd9660 /dev/md1 /mnt/cdrom
#unmount
mount -u /mnt/cdrom
mdconfig -d -u 1
// Ubuntu
#load loop kernel module
sudo modprobe loop
sudo mount debianetch.iso /media/isoimage/ -t iso9660 -o loop
Rotate Nginx Access Logs
#!/bin/sh
mv /var/log/nginx/nginx-access.log /var/log/nginx/nginx-access.log.0
mv /var/log/nginx/nginx-error.log /var/log/nginx/nginx-error.log.0
pid=`cat /var/run/nginx.pid`
kill -USR $pid
gzip --best /data/logs/nginx-access.log.0
gzip --best /data/logs/nginx-error.log.0
PHP FastCGI Server Init Script / Start Script
#!/usr/local/bin/bash
## ABSOLUTE path to the PHP binary
PHPFCGI="/usr/local/bin/php-cgi"
## tcp-port to bind on
FCGIPORT="9000"
## IP to bind on
FCGIADDR="127.0.0.1"
## number of PHP children to spawn
PHP_FCGI_CHILDREN=20
## number of request before php-process will be restarted
PHP_FCGI_MAX_REQUESTS=400
# allowed environment variables sperated by spaces
ALLOWED_ENV="PATH USER"
## if this script is run as root switch to the following user
USERID=nobody
## dunno, but without this, php wouldn't accept request
FCGI_WEB_SERVER_ADDRS="127.0.0.1"
if test x$PHP_FCGI_CHILDREN = x; then
PHP_FCGI_CHILDREN=5
fi
ALLOWED_ENV="$ALLOWED_ENV PHP_FCGI_CHILDREN"
ALLOWED_ENV="$ALLOWED_ENV PHP_FCGI_MAX_REQUESTS"
ALLOWED_ENV="$ALLOWED_ENV FCGI_WEB_SERVER_ADDRS"
if test x$UID = x0; then
EX="/usr/bin/su -m $USERID -c \"$PHPFCGI -q -b $FCGIADDR:$FCGIPORT\""
else
EX="$PHPFCGI -b $FCGIADDR:$FCGIPORT"
fi
echo $EX
# copy the allowed environment variables
E=
for i in $ALLOWED_ENV; do
E="$E $i=${!i}"
done
# clean environment and set up a new one
nohup env - $E sh -c "$EX" &> /dev/null &
Extract First Image From FLV
ffmpeg -i movie.flv -vcodec mjpeg -vframes 1 -an -f rawvideo -s 320x240 movie.jpg
Shell War Code
// will keep that user out from the shell
while true
do
kill -9 `ps -aux | grep [u]sername | awk '{ print $2 }'`
sleep 2
done