One, ubuntu16.04 install graphical interface
apt-get update
apt-get upgrade
apt-get install ubuntu-desktop
reboot
Only guest can log in at this time
cd /usr/share/lightdm/lightdm.conf.d
chmod 777 50-ubuntu.conf
Continue: vi 50-ubuntu.conf
文件 /usr/share/lightdm/lightdm.conf.d/50-ubuntu.conf
修改前
[Seat:*]
user-session=ubuntu
修改后
[Seat:*]
user-session=ubuntu
greeter-show-manual-login=true
allow-guest=false
# 文件 /root/.profile
# 文件修改前
# ~/.profile: executed by Bourne-compatible login shells.
if [ "$BASH" ]; then
if [ -f ~/.bashrc ]; then
. ~/.bashrc
fi
fi
mesg n || true
# 文件修改后
# ~/.profile: executed by Bourne-compatible login shells.
if [ "$BASH" ]; then
if [ -f ~/.bashrc ]; then
. ~/.bashrc
fi
fi
tty -s && mesg n || true
2. Basic commands
1. Check the system and kernel
cat /etc/os-release
uname -mrs
2. Check CPU
grep "CPU" /proc/cpuinfo
3. Run time
uptime
4. Check the number of system bits
getconf LONG_BIT
5. Check the hard disk and partition
df -h
6. Software installation and uninstallation are different from centos and ubuntu
yum update
#Update system yum makecache #Update software source cache
yum search software name#search software
yum install software name#install software
yum remove software name#uninstall software
7. Software management
service software name start #start
service software name restart #restart
service software name stop #close
service software name status #status
8. File and folder management
touch file name # create file
mkdir –pa/b/c/d # recursively create folder
cp aa bb #copy file
mv aa cc
#rename or copy chmod 0755 d/ #directory permission
chown – R Username: User group e/
#Directory ownership rm a.bc -rf #Delete files/folders
9. File download
wget http://download address
wget https://mirrors.aliyun.com/centos/7.3.1611/isos/x86_64/CentOS-7-x86_64-DVD-1611.torrent
10. Compression and decompression
Compression: tar zcvf node-v4.5.0.tar.gz
Unzip: tar zxvf node-v4.5.0.tar.gz