Xubuntu command

commond  --version  #check the commond version

 

change passwd for root:

sudo passwd root ...

su root   #login in useing root on current user.

 

sudo shutdown now ..#shutdown very slow.

sudo halt -p  ... #-p should have

 

mp3 coder .

sudo apt-get install gstreamer0.10-fluendo-mp3

PATH:

/etc/profile
/etc/environment
/home/bill/.bashrc

change java version:

update-alternatives --config java

update-alternatives --config javac

DF  磁盘

DU

free

自动卸载   sudo apt-get autoremove eclipse

dpkg -P packgename #remove with the confige

dpkg -l  #dpkg -l | grep open

//软链接

ln -s /var/log/mysql/errorlog/ /errorlog