Use Vim text editor - Linux

Vim text editor

1, the role:

• Create or modify text files;
• Maintaining Linux systems in a variety of configuration files;

2, Linux common text editor:

• vi: Unix-system default text editor;
• vim: enhanced version of the vi editor, also known as customary vi;

1, three operating modes Vim text editor

Three modes of vim text editor: command mode, input mode, line mode.

• ---- command mode by a, i, o and other key ----> input mode
• Input Mode ---- ---- press esc> command mode to return
• Command Mode ---- enter a colon: ----> line mode
• Line mode ---- ---- press esc> command mode to return

2, the basic operation of the editor vim

(1) Move the cursor:

Quick Jump :( command mode inline)

• Go to the first line: Home key or "^" key (i.e.: shift + 6), the number "0";
• Jump to the end of the line: End key or "$" key (i.e., shift + 4);

Quick Jump :( command mode within the document)

• Jump to the first line of the document: 1G or gg
• Jump to last line of the document: G
• Jump to file the first line #: #G

(2) display line number

:( line number line mode)

• : Set nu (display line numbers)
• : Set nonu (cancel the display line numbers)

(3) copy, paste, delete :( command mode)

copy:

• Cursor line (current line): yy
• # Line starting from the cursor line: #yy

Paste:

• p (lowercase p): pasted to the front of the cursor target position;
• P (uppercase P): pasted after the cursor target position;

Delete:
(1) To delete a single character: the X-, del, the Delete
(2) delete a row of characters:

• The current cursor line: dd
• # Line starting from the cursor line: #dd
• Delete all the characters before the current cursor to the beginning of the line: d ^
• To delete all the characters after the current cursor to the end of the line: d $

(4) internal inquiry :( command mode)

Query from top to bottom: / string to look
to find from bottom to top:? String you want to find

Location Down: n
Positioning up: N

(5) Revocation and save :( command mode)

Revoked:

• Revoked once: u
• Undo multiple times: execute it several times u command
• Undo all operations: U (uppercase)

Storage:

• Save: ZZ (uppercase)

(6) Save and exit line mode :()

: w (save)
: w /root/test.txt (Save)
: q (quit without change)
: q! (exit, modify the content without saving exit)
: WQ (save and exit)

(7) to open or edit the document :( line mode)

: E /root/yum.conf (editing documents)
: r /root/test.txt (open a document)

(8) the contents of the file to replace :( line mode)

: S /root/yum.conf (in the first row of the query cursor old string, and replaced with new string)
: S / old / new / G (in rows where the cursor strings to find all of the old, and are replacement) as new string
: #, # S / old / new / G (Find all the old strings between specified rows, and are replaced with new string)
:% S / old / new / G (in Find the full text of all the old strings, and are replaced) as new string
:% S / old / new / gc (Find all the old strings throughout the text, and are replaced with new strings, but each must be confirmed )