Add correct host key in /home/user/.ssh/known_hosts to get rid of this message. Offending key in /home/user/.ssh/known_hosts: 11 Permission denied (publickey,password). here is the solution: sed -i '11d' /home/user/.ssh/known_hosts
skype –dbpath=~/.Skype_profile1
skype –dbpath=~/.Skype_profile2
лесен и удобен начин ако искаме да инсталираме(клонираме) пакети от текущ на нов сървър
server1:
dpkg –get-selections > dump-server1-packages
прехвърляме си файла
server2:
dpkg –set-selections < dump-server1-packages
apt-get update
apt-get -u dselect-upgrade
правенето на резервно копие,клониране или ресторване от имидж става много лесно с инструмента “dd”
клониране хард диск
dd if=/dev/sda of=/dev/sdb
/dev/sda е хард диска от който ще клонираме /dev/sdb е хард диска върху който ще клонираме
създаване на имидж на твърдия диск
dd if=/dev/sda of=/mnt/hard-drive-backup.img
създаване на имидж на дял(партишън) от твърдия диск
dd if=/dev/sda4 of=/mnt/partition4.img
възстановяване на целия хард диск от имидж
dd if=/mnt/hard-drive-backup.img of=/dev/sda
възстановяване на партишън от имидж
dd if=mnt/partition4.img of=/dev/sda4
sed ‘s/([^:]*).*/1/’ /etc/passwd
ето и един много по-лесен начин 🙂
awk -F’:’ ‘{print $1}’ /etc/passwd
Ако сме решили чрез perl скриптове да манипулираме данни в mysql database сървър, първо ще трябва да си инсталираме следните зависимости
aptitude search perl | grep ‘mysql’
i libclass-dbi-mysql-perl – extensions to Class::DBI for MySQL
p libcrypt-mysql-perl – Perl module to emulate the MySQL PASSWORD(
p libdatetime-format-mysql-perl – Parse and format MySQL dates and times
i libdbd-mysql-perl – Perl5 database interface to the MySQL data
i A libtime-piece-mysql-perl – Time::Piece::MySQL – Adds MySQL-specific m
apt-get install libdbd-mysql-perl libclass-dbi-mysql-perl
Сваляме си пакетите от официалния сайт http://www.oracle.com/technetwork/java/javase/downloads/index.html
jdk-7u6-linux-i586.tar.gz
jre-7u6-linux-i586.tar.gz
java -version
java version “1.6.0_26”
Java(TM) SE Runtime Environment (build 1.6.0_26-b03)
Java HotSpot(TM) Client VM (build 20.1-b02, mixed mode, sharing)
tar zxvf jdk-7u6-linux-i586.tar.gz
mv jdk1.7.0_06/ /usr/lib/jvm/jdk1.7.0_06
update-alternatives –install “/usr/bin/java” “java” “/usr/lib/jvm/jdk1.7.0_06/bin/java” 1
update-alternatives –install “/usr/bin/javac” “javac” “/usr/lib/jvm/jdk1.7.0_06/bin/javac” 1
update-alternatives –install “/usr/bin/javaws” “javaws” “/usr/lib/jvm/jdk1.7.0_06/bin/javaws” 1
update-alternatives –config java
There are 3 choices for the alternative java (providing /usr/bin/java).
Selection Path Priority Status
————————————————————
* 0 /usr/lib/jvm/java-6-sun/jre/bin/java 63 auto mode
1 /usr/lib/jvm/java-6-sun/jre/bin/java 63 manual mode
2 /usr/lib/jvm/jdk1.7.0_06/ 1 manual mode
3 /usr/lib/jvm/jdk1.7.0_06/bin/java 1 manual mode
Press enter to keep the current choice[*], or type selection number: 3
update-alternatives: using /usr/lib/jvm/jdk1.7.0_06/bin/java to provide /usr/bin/java (java) in manual mode.
java -version
java version “1.7.0_06”
Java(TM) SE Runtime Environment (build 1.7.0_06-b24)
Java HotSpot(TM) Client VM (build 23.2-b09, mixed mode)
update-alternatives –config javac
There are 2 choices for the alternative javac (providing /usr/bin/javac).
Selection Path Priority Status
————————————————————
* 0 /usr/lib/jvm/java-6-sun/bin/javac 63 auto mode
1 /usr/lib/jvm/java-6-sun/bin/javac 63 manual mode
2 /usr/lib/jvm/jdk1.7.0_06/bin/javac 1 manual mode
Press enter to keep the current choice[*], or type selection number: 2
update-alternatives: using /usr/lib/jvm/jdk1.7.0_06/bin/javac to provide /usr/bin/javac (javac) in manual mode.
update-alternatives –config javaws
There are 2 choices for the alternative javaws (providing /usr/bin/javaws).
Selection Path Priority Status
————————————————————
* 0 /usr/lib/jvm/java-6-sun/jre/bin/javaws 63 auto mode
1 /usr/lib/jvm/java-6-sun/jre/bin/javaws 63 manual mode
2 /usr/lib/jvm/jdk1.7.0_06/bin/javaws 1 manual mode
Press enter to keep the current choice[*], or type selection number: 2
update-alternatives: using /usr/lib/jvm/jdk1.7.0_06/bin/javaws to provide /usr/bin/javaws (javaws) in manual mode.
Enable mozilla firefox plugin:
32 bit:
ln -s /usr/lib/jvm/jdk1.7.0/jre/lib/i386/libnpjp2.so ~/.mozilla/plugins/
64 bit:
ln -s /usr/lib/jvm/jdk1.7.0/jre/lib/amd64/libnpjp2.so ~/.mozilla/plugins/
Depending on your configuration, you might need to update the apparmor profile for firefox (or other browsers) in /etc/apparmor.d/abstractions/ubuntu-browsers.d/java
# Replace the two lines:
# /usr/lib/jvm/java-*-sun-1.*/jre/bin/java{,_vm} cx -> browser_java,
# /usr/lib/jvm/java-*-sun-1.*/jre/lib/*/libnp*.so cx -> browser_java,
# with those (or adapt to your new jdk folder name)
/usr/lib/jvm/jdk*/jre/bin/java{,_vm} cx -> browser_java,
/usr/lib/jvm/jdk*/jre/lib/*/libnp*.so cx -> browser_java,
Then restart apparmor:
sudo /etc/init.d/apparmor restart
стъпките за ъпдейт на jre са идентични.
http://askubuntu.com/questions/56104/how-can-i-install-sun-oracles-proprietary-java-6-7-jre-or-jdk
http://askubuntu.com/questions/55848/how-do-i-install-oracle-java-jdk-7
sudo apt-get install poc-streamer
mp3cut -o newmp3.mp3 -t 00:00:44+000-00:01:09+000 originalmp3.mp3
по този начин,ще изрежем мп3-ката от 44 секунда до 1 мин и 9 секунди
бърз начин чрез който можем да си обновим firefox-a
sudo add-apt-repository ppa:mozillateam/firefox-stable
sudo apt-get update
sudo apt-get upgrade
BleachBit е полезен инструмент с който можем да изчистим излишните неща от файловата система и да освободим свободно пространство
sudo apt-get install BleachBit