Mahmoud Elsonbati

1- Download Maven binaries from  Maven Download Page . 2- add the invironment variables M2_HOME and also append the PATH $ cd $HOME $ vi .bash_profile #Add below lines in the profile export M2_HOME=/Users/yourname/apache-maven-3.2.1 export PATH=$PATH:$M2_HOME/bin #save and quit $ source .bash_profile that's it ...test it now ;) $ mvn --version

php $str = ltrim ( $str , '0' ); java str . replaceFirst ( "^0+(?!$)" , "" )

1- get the current version uname -r 2- check the space in boot df -h 3- list all installed linux images dpkg --list | grep linux-image 3- Purge the ones we don’t need any more.  for example  this one "linux-image-3.2.0-23-generic" sudo apt-get purge linux-image-3.2.0-23-generic if this command didn't work then try to do it  manually by this cd /boot sudo rm -f *-3.5.0-21-* 4-Verify If everything worked, you can run these commands without errors. sudo update-grub2 && sudo update-initramfs -u Then update everything to ensure that our system is clean and up-to-date sudo aptitude safe-upgrade && sudo reboot now