LINUX_ command format and command prompt

# All files in Linux

Command format:

command [feature options] [File path]

cmd [options] [path]

# Multiple feature options to put together, such as

Rsync-avz/backup [email protected]:: Backup--password-file=/etc/rsync.password

In the command window [[email protected] shell]# What does that mean?

# Name: Command line prompt, controlled by environment variable PS1

Root user who is currently logged on to the terminal

Study host name (/etc/sysconfig/network)

~ Current user's home directory

# indicates the root user's terminal

$ normal User's terminal

Command Prompt modification:

# Essence Modify environment variable PS1

1. View the value of the environment variable PS1

echo $PS 1

2. Related parameters

\u Current End user

\h Current host Name

\w which parent directory the current working path belongs to

\w displays the full path of the current working path

\d display date, format: Days of the week and months

\ t 24 format displays time

\ t 12 format displays time

The first few orders issued by \#

\$ user Identity prompt, # indicates the root user, $ represents a normal user

3. Modify the command prompt

Temporary display of the current terminal:

Ps1= ' [\[email protected]\h \ t \w]\$ '

Permanent display:

echo "Export ps1=" [\[email protected]\h \ t \w]\$ ' ">>/etc/profile. /etc/profile

　　

LINUX_ command format and command prompt