Compiling kernel 3.4 on debian wheezy

sudo apt-get install kernel-package fakeroot build-essential

mkdir ~/tmp
cd ~/tmp
wget http://www.kernel.org/pub/linux/kernel/v3.0/linux-3.4.tar.bz2
tar xvf linux-3.4.tar.bz2
cd linux-3.4/
cat /boot/config-`uname -r`>.config
make oldconfig

If your current kernel is 3.3.5 the questions that await are given at the bottom of this post with links to descriptions of the different options. As usual, if in doubt, just hit enter.

make-kpkg clean

Building takes ages (depending on number of cores committed), so don't launch it at 4 pm on a Friday if you need to shut down your computer before going home... As usual, use the -jX switch for parallel builds, where X is the number of cores+1 (i.e. 4 cores => -j5)

The following command goes on a single line
time fakeroot make-kpkg -j5 --initrd --revision=3.4.0 --append-to-version=-amd64 kernel_image kernel_headers

Once the build is done, move the .deb files out of the way and to your linux-3.4 directory for safe-keeping
 mv ../*3.4.0*.deb .
sudo dpkg -i *.deb

(c) from here

bash howto's 3

#This will remove leading spaces...

echo " 1233 test " | sed 's/^ *//g'

#This will remove trailing spaces...

echo " test 543453 " | sed 's/ *$//g'

#Make the following XML file available under http://127.0.0.1:5555/

(printf "HTTP/1.1 200 OK\\r\\nContent-Type: text/xml\\r\\n"; \

printf "Content-Length: $(cat "response.xml"|wc -c)\\r\\n\\r\\n"; \

cat response.xml") | nc -l -p 5555 >/dev/zero 2>&1 &

Howto make patch

#create patch

diff -Naur ./a ./b >patch.diff

#test patch

patch --dry-run -p1 -i patch.diff

#run patch

patch -p1 -i patch.diff

bash howto's 2

#extract from tar.xz

tar -xpJf archive.tar.xz

#setup environment variable

export VAR_NAME="value"

#somewhere use it

VAR_NAME=${VAR_NAME:-"default value"}

echo "$VAR_NAME"

#Запуск команд от имени системных пользователей

#Иногда требуется запустить некую команду, программу или просто проверить права #доступа от имени системных пользователей nobody, apache, и т.д. Простой запуск через

#su - nobody

#Даёт

#This account is currently not available.

#Это происходит из-за того, что у этих пользователей в качестве шела указан /sbin/nologin. #Можно воспользоваться параметром -s для указания другого шела:

su - nobody -s /bin/sh

#И получить нужный результат.

#how to list all disk drives ?

fdisk -l

#Copy a directory (and subdirectories) without .svn files.

rsync -a --exclude=.svn source destination

#Copy directory structure (without files)

find /where/to/search -type d | cpio -pvdm /where/to/copy

#find string in files

grep -lir "qwe"

grep -lir "mod.*" ./log*

find ./ -name log* -exec grep -l qwe {} \;

#bash filename extraction

FILENAME="/some/path/my.file.ext"

echo "Path: ${FILENAME%/*}"

echo "Filename: ${FILENAME##*/}"

echo "Extension: ${FILENAME##*.}"

BASENAME=${FILENAME##*/}

echo "Filename w/o extension: ${BASENAME%.*}"

#find the ten biggest files on your file system linux command

du -a /var | sort -n -r | head -n 10

#Show disk usage under Linux for folder

du -h -s /some/folder/path/*

# delete empty lines

sed "/^$/d" input

# remove spaces

sed 's/ //g'

# remove newline chars

sed 's/\n//g'

# search and replace

sed "s/searchpattern/replacepattern/" input

# find commandline options using sed and grep

URL=$(echo $@ | sed 's:\ :\n:g' | grep "url" | sed 's:\-\-url=::')

#Random string

openssl rand -base64 30

#Returns a list of the number of connections by IP.

netstat -an | grep :80 | awk '{print $5}' | cut -f1 -d":" | sort | uniq -c | sort -n

#Print out a list of open connections on your box and sorts them by according to IP address

netstat -atun | awk '{print $5}' | cut -d: -f1 | sed -e '/^$/d' |sort | uniq -c | sort -n

#Print the number of established and listening connections to your server on port 80 per each IP address

netstat -plan|grep :80|grep -E "(EST|LIST)"|awk {'print $5'}|cut -d: -f 1|sort|uniq -c|sort -nk 1

#Get Public IP and copy it to Clipboard

#!/bin/bash

MYIP=`curl -s 'http://checkip.dyndns.org' | sed 's/.*Current IP Address: \([0-9\.\.]*\).*/\1/g'`

echo $MYIP | pbcopy

/usr/local/bin/growlnotify 'IP address copied' -m "Address was: $MYIP"

#backup

sudo su

cd /

tar cvpjf /tmp/backup.tar.bz2 --exclude=/proc --exclude=/tmp --exclude=/dev --exclude=/lost+found --exclude=/backup.tar.bz2 --exclude=/mnt --exclude=/sys /

#http://www.catonmat.net/blog/sed-one-liners-explained-part-one/

#http://sed.sourceforge.net/sedfaq4.html

#http://sed.sourceforge.net/sed1line.txt

#http://tdistler.com/2009/04/17/sed-regular-expression-find-lines-not-matching-a-string

#Substitute (find and replace) only the last occurrence of "foo" with "bar".

sed 's/\(.*\)foo/\1bar/'

#Substitute all occurrences of "foo" with "bar" on all lines that DO NOT contain "baz".

sed '/baz/!s/foo/bar/g'

#Substitute all occurrences of "foo" with "bar" on all lines that contain "baz".

sed '/baz/s/foo/bar/g'

#extract language

cat $F | grep "Stream" | sed "s/ //g" | cut -f 1 -d ":" | sed "/.*(.*).*/!s/.*/und/g" | sed "s/^.*(\(.*\))$/\1/"

#echo full path to command

echo $0

echo "$0" | sed "s|^./|$(pwd)/|"

which ffmpeg

which ffmpeg | sed "s|^./|$(pwd)/|"

#/usr/local/bin/get-ip-address

/sbin/ifconfig | grep "inet addr" | grep -v "127.0.0.1" | awk '{ print $2 }' | awk -F: '{ print $2 }'

services in slackware

service scripts located at:

/etc/rc.d

/etc/init.d

to start application on system start:

add start call at /etc/rc.d/rc.M or /etc/rc.d/rc.local

for example:

if [ -x /etc/rc.d/rc.nginx ]; then

. /etc/rc.d/rc.nginx start

fi

network howto's

#network listen adresses:

netstat -nlp

Как рекурсивно поменять права только каталогам или только файлам

#вариант 1

cd /home/some_dir

chmod -R 644 *

find . -type d -exec chmod 0755 {} ';'

#вариант 2

#Эта команда рекурсивно пройдется по текущему (точка ".") каталогу и всем его подкаталогам и изменит права на 755 только у каталогов (-type d)

find . -type d -exec chmod 755 {} \;

#Похожим образом действуем и с файлами:

find . -type f -exec chmod 644 {} \;

#если необходимо применить действия только к определенным файлам, подходящим по маске, то действуем так:

find . -type f -name '*.htm*' -exec chmod 644 {} \;

#а если нужно применить команду только к файлам или каталогам определенного владельца, то -

fiind . -type d -user fileowner -exec chmod 0755 {} \;

bash howto's

first line:

#!/bin/bash

#input parameters count:

$#

#script parameters:

$0 - self name, $1 ... $9 - input params

#check that file exist, the spaces near "[" and "]" are required :

if [ -e "streamcount.info" ]

then

echo 'file exist info'

fi

#get file extension:

SHORTFILENAME=$(basename $FULLFILENAME)

DEST_EXT=${SHORTFILENAME##*.}

#get temporary file name:

TFILE="/tmp/streaminfo.$RANDOM.$$.tmp"

#working directory:

$PWD

#redirect error stream to console and filter strings that contain word "Stream":

ffmpeg -i "$SRC" 2>&1 | grep "Stream"

#count strings with grep -c and put it into variable:

a=$( cat < $TFILE | grep -c "Audio:" )

#save command result as array with ( $( ) ):

s=( $( cat < $TFILE | grep "Audio:" | cut -f 2 -d "#" | cut -f 1 -d "(" ) )

#print array contents:

echo "stream numbers: ${s[@]:0}"

#use "for" construction:

for i in `seq 2 $a`;

do

index=$( echo "$i-1" | bc )

v="${s[index]}"

echo "$i. $v"

done

#extract float value:

x=$( echo "qwerty: 123.123123 !" | sed "s/.*[^0-9]\([0-9]\.[0-9]*\).*/\1/g" )

#float point operations:

echo "(256 / $x) / 10" | bc

for float result:

bc -l

# Checks for root privileges

if [ "$(whoami)" != 'root' ]

then

echo "You need to be root to execute uphosts. Exiting!"

exit 1

fi

# Checks required packages

ABORT=0

builtin type -P wget &>/dev/null || { echo -n "wget is missing."; ABORT=1; }

builtin type -P unzip &>/dev/null || { echo -n "unzip is missing."; ABORT=1; }

builtin type -P fromdos &>/dev/null || { echo -n "fromdos(tofrodos) is missing."; ABORT=1; }

builtin type -P grep &>/dev/null || { echo -n "grep is missing."; ABORT=1; }

if [ $ABORT != 0 ]

then

echo " Exiting!"

exit 2

fi