moisesjurad0/workshop-tmux

workshop-tmux

this workshop is to practice tmux on a docker machine on a windows host (docker kernerl configured as linux).

1. Previous Steps

1. init git repo for documentation.

2. Initialize docker machine

1. add Dockerfile and docker-compose.yml files with alpine only to have a machine to connect.
2. run docker-compose up or docker-compose up --build (this one is to rebuild the images each time you up compose e.g. add/install somenthing in your machine)

3. Connect to container using SSH

this ocassion I'm using git-bash, but we can user putty or openssh. You can skip this whole section if you use the integrated terminal on docker for windows.

1. run ssh user@localhost -p 2222

   The authenticity of host '[localhost]:2222 ([::1]:2222)' can't be established.
   ED25519 key fingerprint is SHA256:ZmrF8ZVg5H/esEsmJIE9xHsGQkBRmswHUXzTTqp9BBU.
   This key is not known by any other names
   Are you sure you want to continue connecting (yes/no/[fingerprint])?

   • warning: if you rebuild images (docker-compose up --build) and after that you connect again to the docker-compose machine you're gonna need to update the machine information in file [path_to_user]/.ssh/known_hosts (you can just delete this file or delete those lines). If you don't this will appear

   @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
   @    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
   @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
   IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
   Someone could be eavesdropping on you right now (man-in-the-middle attack)!
   It is also possible that a host key has just been changed.
   The fingerprint for the ED25519 key sent by the remote host is
   SHA256:vQXNMWcomdhWjvDG5mB6udfN7vezkVqI/C/s7JWI/5E.
   Please contact your system administrator.
   Add correct host key in /c/Users/moise/.ssh/known_hosts to get rid of this message.
   Offending ECDSA key in /c/Users/moise/.ssh/known_hosts:7
   Host key for [localhost]:2222 has changed and you have requested strict checking.
   Host key verification failed.

2. write answer: yes

   Warning: Permanently added '[localhost]:2222' (ED25519) to the list of known hosts.
   
   user@localhost's password:

3. enter password: user

   Welcome to Alpine!
   
   The Alpine Wiki contains a large amount of how-to guides and general
   information about administrating Alpine systems.
   See <https://wiki.alpinelinux.org/>.
   
   You can setup the system with the command: setup-alpine
   
   You may change this message by editing /etc/motd.

4. Running Tmux inside the container

1. run tmux to init a session.
2. run exit to close

5. cheatsheet

https://home.brainofshawn.com/uploads/tmux.pdf

Commandline Options

• tmux new -A -s session_name ➡ create new session
• tmux attach -t session_name ➡ attach to session
• tmux ls ➡ show active sessions

Control-B Commands (ctrl-b, then:)

• D ➡ Detach Session
• C ➡ Create Window
• N ➡ Next Window
• P ➡ Previous Window
• 0-9 ➡ Go to Window
• % ➡ Split Horizontal
• " ➡ Split Veritical
• Arrows ➡ Switch Pane
• O ➡ Next Pane
• X ➡ Close Pane/Windo

6. other Control-B Commands (ctrl-b, then:)

• $ ➡ Rename Session
• , ➡ Rename Window (Current Window)
• z ➡ zoom into Panel / zoom out Panel
• q ➡ highlight Panels numeric ids
• q then 0-9 ➡ Go to Pane

7. other Control-B Commands (ctrl-b and at the same time:)

• Arrows ➡ Resize Panels

8. Concepts

• Session ➡ the parent process
• Window ➡ live as many as you want inside the Session
• Panel ➡ multiple division inside a Window