Linux first day

To start the graphical interface:

#startx &

Adjust language to Chinese (Medium character encoding)

#localectl-H View Help

#localectl List-locales to see what languages are available

#localectl Set-locale Lang=zh_cn.utf8

#locale View the current language environment

SSH login: Remote connection: SSH protocol: Secure Shell

See if SSH port 22 is open

TCP Numeric listening #ss-TNL TCP value Monitoring

To see if the system is listening on port 22nd of the TCP protocol: 22

View IP Address:

#ifconfig

#ip Addr List

See if the firewall is turned on:

#iptables-L-N View firewall open

#iptables-F Empty firewall (only valid for current)

#systemctl Stop Firewalld.service stopping the Firewall service (currently active)

#systemctl Disable Firewalld.service Disabling the Firewall service (permanently active)

#service iptables Stop (CENTOS6 currently active)

#chkconfig iptables off (centos6 disabled)

# chkconfig iptables off (set auto-start to OFF)

# chkconfig--del iptables (remove boot auto start)

View the currently used shell

#echo $SHELL

Terminal switching:

Ctrl+alt +f[1-6] Virtual Terminal 6

Ctrl+alt +f7 Graphics Terminal (CENTOS6 fixed)

Centos7 the virtual terminal on which the virtual terminal is located.

Physical Terminal: Console

Virtual Terminal:TTY

Serial Terminal: TTYs

Pseudo Terminal: Through the remote terminal is pseudo Terminal Pty

One of the philosophical ideas of Linux: all documents.

Physical Terminal files:/dev/console

Virtual Terminal files:/dev/tty#

Serial Terminal file:/dev/ttys#

Pseudo Terminal file:/dev/pts/#

Linux first day