How to modify a Linux Command Prompt

Source: Internet
Author: User

How to modify a Linux Command Prompt

How to modify the Linux Command Prompt:
Modify the Linux Command Prompt to modify the Linux environment variable PS1. You can use VI to edit the/etc/profile file and add:
Export PS1 = '[\ U @ \ H \ W] \ $'
You can also edit it ~ /. Profile file (note the first line #/etc/profile ~ /. Profile)
Where \ U shows the current user account, \ h shows the current host name, \ W shows the current path, \ $ shows the '$' symbol
\ W can replace \ W to convert absolute paths to relative paths.
The following describes the meaning of the default special symbols in the environment:
\ D: represents the date, in the format of weekday month date, for example: "Mon Aug 1"
\ H: complete host name. For example, if my machine name is fc4.linux, this name is fc4.linux.
\ H: only the first name of the host. In the preceding example, the name is FC4, and the name of. Linux is omitted.
\ T: The display time is in the 24-hour format, for example, HH: mm: Ss.
\ T: The display time is in the 12-hour format.
\ A: The display time is in the 24-hour format: hh: Mm.
\ U: Account name of the current user
\ V: Bash version information
\ W: complete working directory name. In the home directory ~ Replace
\ W: Use basename to get the working directory name. Therefore, only the last directory is listed.
#: Commands issued
\ $: The prompt character. If it is root, the prompt is: #, and the normal user is: $

Another question is, after modifying the. Profile/profile file, how can I apply the changes?

We can use the following command

source /etc/profile   or    source /etc/home/user/.profile
 
 
 
 
 
 
 

Change title

Prompt_command = 'echo-ne "/033] 0; $ {user }@$ {hostname }: ${PWD}/007 "'. In this way, the title at terminal will display the user @ machine name: path.

Change the color of the command prompt:

In ~ /. Add (green) to bashrc)

Export PS1 = "/[/033 [32 m/] [/W]/$/[/033 [0 m/]"

In/root/. bashrc :( red)

Export PS1 = "/[/E [31 m/] [/W] #/[/E [0 m/]"

Notice:

1./033 [32 M indicates that the subsequent characters must be green. /033 is also available for/E (0 m, indicating that default is used. 30 (black), 31 (red), 32 (green), 33 (yellow), 34 (blue), 35 (magenta), 36 (blue), 37 (white ).

2. For each color parameter,/[and/] Must be wrapped with two escape characters. This must be set at least on Ubuntu.

3./$ does not seem to work very well. When sudo reaches the root user, $ is still displayed, ideally #. So you can use $ directly without escaping/$

PS:

  • /: An ASCII Bell character (07)
  • /D: The date in "weekday month date" format (e.g., "Tue May 26 ")
  • /D {format}: The format is passed to strftime (3) and the result is inserted into the prompt string; an empty format results in a locale-specific time representation. The braces are required
  • /E: An ASCII escape character (033)
  • /H: The hostname up to the First '.'
  • /H: The hostname
  • /J: The number of jobs currently managed by the Shell
  • /L: The basename of the shell's terminal device name
  • /N: Newline
  • /R: Carriage Return
  • /S: The name of the shell, the basename of $0 (the portion following the final slash)
  • /T: The current time in 24-hour hh: mm: SS format
  • /T: The current time in 12-hour hh: mm: SS format
  • /@: The current time in 12-hour AM/PM format
  • /: The current time in 24-hour HH: Mm format
  • /U: The username of the current user
  • /V: The version of bash (e.g., 2.00)
  • /V: The release of bash, version + patch level (e.g., 2.00.0)
  • /W: The current working directory, with $ home abbreviated with a Tilde
  • /W: The basename of the current working directory, with $ home abbreviated with a Tilde
  • /!: The History number of this command
  • /#: The command number of this command
  • /$: If the specified tive uid is 0, a #, otherwise a $
  • /NNN: The character corresponding to the octal number NNN
  • //: A backslash
  • /[: Begin a sequence of non-printing characters, which cocould be used to embed a terminal control sequence into the prompt
  • /]: End a sequence of non-printing characters
 
 
 
 
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