1. Nginx Related Commands

• Check Nginx Status

ps -ef|grep nginx

• Start Nginx

cd /usr/local/nginx/sbin/
./nginx

• Restart Nginx After Modifying Configuration File

cd /usr/local/nginx/sbin/./nginx -s reload

2. Common Docker Commands

• View All Containers, Including Running and Stopped

docker ps -a

• View All Running Containers

docker ps

• Start a Stopped Container

docker start ContainerNameOrID

• Restart a Container

docker restart ContainerNameOrID

• Enter the Corresponding Container

docker exec -it ContainerNameOrID bash

• Stop a Running Container

docker stop ContainerNameOrID

• View Images

docker images

• Package a Docker Image

docker save -o TargetFileName.tar ImageName

• Load a Packaged Docker Image

docker load -i PathToTargetFile

• Mount a Directory from the Host to the Image

docker run -it -v /home/ocr/training/:/home/ocr/training ImageName /bin/bash
# Use -v parameter, the path before the colon is the host directory, must be an absolute path, the path after the colon is the mount path inside the image

• Create a Container from an Image

docker run --name ImageName ContainerName

3. Common Commands for Viewing Logs

• Use tail to View Real-Time Logs

tail -f LogFileName

• Use cat to View Logs Near a Keyword

cat -n LogFileName|grep "Keyword"

4. Basic Linux Operations

• View Current Processes

top

• Filter Specific Processes, e.g., Java Processes

ps -ef | grep java

• Kill a Process

kill ProcessID

• Change to a Specific Directory

cd Path

• Go Back to the Parent Directory

cd ..

• View File Information in the Current Directory

# View detailed information of files in the current directory
ll
# View files in the current directory
ls

• Create a Folder

mkdir FolderName

• Create a File aa.txt

touch aa.txt

• Delete File aa.txt

rm -f aa.txt

• Delete a Folder

rm -rf FolderName

• Copy Files or Directories

# Copy file
cp SourceFile CopyFile
# Copy directory
cp -r SourceDirectory CopyDirectory

• Move/Rename Files or Directories

mv OldName NewName

• View Current System Time

date

• Show Current Path

pwd

• Search for Files in a Specified Path

# Search for files by name
find SpecifiedPath -name FileName
# Search for files by type
find SpecifiedPath -type f -name FileName
find SpecifiedPath -type d -name FolderName

• Change File Permissions

chmod xxx FilePath

• Archive Related Commands

# Compress
tar -cvf archive.tar Filename
# Decompress
tar -xvf archive.tar Filename

5. View Resource Usage

• top to View Real-Time System Process Activity

top

You can see CPU usage, memory usage, process list, and detailed information of each process.

• df to View Disk Space Usage of the File System

# Disk space usage
df -h
# File system type
df -T
# inode usage
df -i

• free to View Memory Usage

# Display memory usage.
free -h
# Display memory usage in MB.
free -m
# Display memory usage in GB.
free -g

6. View Port Usage

• lsof to View Port Usage

# xxxx is the port number
lsof -i:xxxx

Conclusion

The above is a summary of some commonly used Linux commands. If you find the content helpful, don’t hesitate to give a thumbs up; your support is the biggest motivation for the author to update!

See you in the next article~