centOS 7 directory file management commands

cat; more; less; head; tail; wc; grep; bzip2; tar; vi; simple operation vim command
1.cat
see all of the contents of the file; unsuitable for reading at length files

2.more
can be paged view; strong flexibility; spacebar to turn the pages; see line by line using the enter key; to exit Review using q

3.less
support page view; support up and page down; find support content; pgup page up; pgdown turned down page

using 4.cat and more binding

5.head
view the start line, 10 lines before the default view data

6.tail
view the end of the line, the default view 10 rows


7.wc statistics file
wc common option
-l statistical lines; -w count the number of words; -c count size

8.grep
grep common option
-i to ignore case
-v reversed, inverted



9.gzip file compression and decompression
gzip common options
-q high compression
-d decompress compressed files

10 .bzip2 common options
-q high compression
-d decompress

11.tar archive command common options
-c creating an archive
-x extract the files
-C extracted to the specified directory
-v displays detailed information
-z to use gzip compression and decompression to create file
-j Use bzip2 compressed or decompressed file is created
-p compressed file directory permissions remain unchanged
-t view a list of data compression
-P remains compressed source file directory does not change

12.vi and vim
three modes of vi
1) command mode
to adjust the cursor position; copy, delete, paste using
2) insert mode
edit text using; add, modify, update data using
3) line mode
to save files using a text search to replace
switching between 4) mode
command to enter the insert mode
i is inserted in front of the cursor transactions; a is inserted in the end of the line cursor data; o next line of cursor line data is inserted into
the input mode retreat command mode
using the key esc
5) line mode
using the input esc:
6) line jump
^ reaches the first row; o reaches the first row; $ T reaches the end of the line;
Room 7) line jump
gg quick access to the first line; G to quickly reach the end of the line; logG quickly reach line 10
8) copy
yy copying a row of data; 5yy copy cursor five lines
9 ) paste
P
10) delete
dd delete the entire row of data
x delete cursor position data
d ^ cursor is deleted before the data
d $ delete data after the cursor
11) delete undo
undo once with u
undo several times with u (uppercase )
12) line mode
: W Save
: x save and quit
: wq save and quit
: wq! Forced to save and exit
: q! Forced to exit
and: q editing without saving
13) Alternatively
: 1,20 s / h / bb / g to 1 h to 20 into line BB
: S% / b / dd / G into the entire file dd b