Linux Learning Notes-2015-12-17

1. Create a directory/data

Mkdir/data

CD/; mkdir data

Command summary:

mkdir command to create a directory

LS-L long format display-D directory displays directory or file

CD switch directory hierarchy

2. Create the Aaa.txt file below/data

Pwd

Cd/data;touch Aaa.txt or Touch/data/aaa.txt

3. Adding content to aaa.txt study Linux

echo "Study Linux" >/data/aaa.txt

Vi/vim I study Linux QW

4. Copy the Aaa.txt file to the/temp.

Cp/data/aaa.txt/temp

Parameter-A can be copied directory-pdr

5. Move the/data directory to the/root

mv/data//root/

6. Go to the data directory in the root directory and delete the Aaa.txt

Cd/root/data;rm Aaa.txt y

Rm-f/root/data/aaa.txt

7. Exit to the previous level directory, delete the data directory

CD: Rm-r/data

Paired with Xargs

Find. -type f-mtime +15 |xargs rm-f Delete file 15 days ago Current directory file

Find. -type d-mtime +30 |xargs rm-rf Delete directory 30 days ago directory under current directory

Using the-exec of find

Find/logs-type f-mtime +5-exec rm {} \; Find files that change time before 5th in the/log directory and delete

8. Filtering files

Cat

Grep-v

Grep

9. Create a complete/data/aaa/directory with one command

Mkdir-p/DATA/AAA/B/C/D

tree/data/Display tree structure

10. It is known that the Test.txt file already exists in the/tmp directory, how to execute the command in order to copy the/mnt/test.txt to/tmp and overwrite the/tmp/test.txt, and the Linux system does not prompt to overwrite

/bin/cp/mnt/test.txt/tmp/test.txt

\cp/mnt/test.txt/tmp/test.txt

11. Only the contents of lines 20th through 30th in the Ett.txt file (100 included) are produced.

This article is from the "Small Zheng Technology Blog" blog, please be sure to keep this source http://ko178.blog.51cto.com/220419/1725750

Linux Learning Notes-2015-12-17