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Self-use Cheatsheet

Self-use Cheatsheet

·410 words·2 mins·
Learning
Kre³
Author
Kre³
Doing code and art with ❤
Table of Contents
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A self-use cheatsheet to record commands that are needed but easily forgotten. Constantly updating…

Git
#

Initialize
#

git init

Associate with a remote repository
#

git remote add origin <remote address>
git -M main # Switch the default branch to main (master is no longer used)
git pull <local> <remote>

Commit changes
#

git add <file>
git commit -m 'descriptions'
git push origin main

Branch management
#

git branch <branch name>            # Create <branch name> branch
git checkout <branch name>          # Switch to <branch name> branch
git switch <branch name>            # Switch to <branch name> branch
git checkout -b <branch name>       # Create and switch to <branch name> branch
git switch -c <branch name>         # Create and switch to <branch name> branch
git branch                          # View existing branches (* indicates the current branch)
git merge <branch name>             # Merge <branch name> to the current branch (usually operated under the master branch)
git branch -d <branch name>         # Delete a branch (local)
git push <local> --delete <remote>  # Delete a branch (remote)

Submodules
#

git submodule add <submodule address> <local folder> # Add a submodule, use --force to force the use of existing local files
git submodule foreach git pull    #Submodule update

Linux (Ubuntu) operations
#

Change the Java version of the current environment
#

sudo update-alternatives --config java

Create a user without a shell
#

According to nobody - Ubuntu Wiki, it is not recommended to set the running permission of the program to nobody:nogroup, but to create a new user group.

(I can’t be lazy anymore, sob)

(Method from How can I create a non-login user? - superuser)

sudo useradd -r <username>

This will create a user with the group name and user name both as <username>, and without a user directory.

Certbot
#

dns-challenge self-signed
#

certbot certonly --manual --preferred-challenges dns --email xxxxxx.xxxxx@outlook.com --agree-tos -d *.ohmykreee.top

pppoe-setup
#

Set up dialing
#

pppoe-setup # Start interactive operation

Connect and disconnect
#

ifup ppp0
ifdown ppp0

Status
#

ifconfig ppp0
pppoe-status

docker
#

List containers
#

docker ps -a

Manage containers
#

docker start/stop/restart/rm/port/logs <container>

Run a container in the background
#

docker run -itd --name <name> <container>  # -it: Use interactive mode and allocate a pseudo-terminal
docker exec -it <container>                # -d: Run the container in the background and return the container ID