Liunx instruction

1. ls（ see file ）

ls

2. mkdir（ Create folder ）

mkdir  Folder name 

3. touch （ create a file ）

touch  file name 

4. cat（ View content ）

cat  file name 

5. rm -rf（ Delete file ）

rm -rf deamon.json

6. vi（ modify ）

1.vi + filename // Enter file edit mode 
2. Press i, Enter insertion mode 
3. Press esc sign out 
4. Press shift+ ：  Number   Then input  wq sign out 

7. Modify environment variables

1. Open editor 
 vim /etc/profile 
2.$PATH:( route 1):$PATH:( route 2)
   The first environment 		 The second environment 

8. docker exec -it（ Into the container ）

docker exec -it  Containers ID /bin/bash

9. ls -lah（ Show hidden files ）

ls -lah

10. cp（ Copy command ）

cp  file name   Catalog 

11. docker logs -f （ View container log ）

docker logs -f logstash（ Container name ）

12. Clear container log

New file docker-clear-log, Put it in /usr/local/bin/ Under the table of contents , The contents of the document are as follows ：

#!/bin/bash -e

if [[ -z $1 ]]; then
    echo "No container specified"
    exit 1
fi

if [[ "$(docker ps -aq -f name=^/${1}$ 2> /dev/null)" == "" ]]; then
    echo "Container \"$1\" does not exist, exiting."
    exit 1
fi

log=$(docker inspect -f '{
    {
    .LogPath}}' $1 2> /dev/null)
truncate -s 0 $log

Give the file corresponding permissions , I only gave its owner read / write permission to execute , Others have no permission to execute ：

chmod 700 /usr/local/bin/docker-clear-log

Last , perform

docker-clear-log <container>