githubfoam

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Option 1 — Use full path in run_backup.sh

Find where Ansible is installed:

docker exec -it ansible-netops which ansible-playbook

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$ ansible --version
ansible 2.9.27

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singularity selftest -> run a selftest
singularity --version -> verify installation
which singularity -> verify installation

sudo singularity build --sandbox /tmp/debian docker://debian:latest ->  Build a base sandbox from DockerHub
sudo singularity exec /tmp/debian apt-get update -y ->  Make changes to it
sudo singularity exec --writable /tmp/debian apt-get install git->  Make changes to it
sudo singularity build /tmp/mondebian.simg /tmp/debian -> Build your custom image
sudo singularity exec /tmp/mondebian.simg ls -> Browse your custom image

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#vscode  1.63.2
#remove deleted branches on github that still exist on vscode

Vscode-File-Preferences-Settings-Git-Git:Prune On Fetch #make VS Code run git fetch --prune when fetching remote refs

Vscode-Terminal
git fetch --prune #update/delete remote branch references
git fetch -p #update/delete remote branch references
git branch <branch-name> -D #delete the local branch (-D to force)

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SaltStack master operations

salt-key -L -> Showing all minions
salt-key -a <minion_id> -> Accepting an unaccepted minion
salt-key -A -> Accepting all unaccepted minions
salt-key -d <minion_id> -> Removing a minion
salt '*' state.sls nginx -> Running formula

salt '*' cmd.run 'ls -l /etc'
salt '*' pkg.install vim

githubfoam

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#CLI shortcut keystrokes(linux&MAC)
Ctrl+L: Clear the screen. This is similar to running the “clear” command.
Ctrl+C: Interrupt (kill) the current foreground process running in in the terminal. This sends the SIGINT signal to the process
Ctrl+Z: Suspend the current foreground process running in bash. This sends the SIGTSTP signal to the process. To return the process to the foreground later, use the fg process_name command.
Ctrl+D: Close the bash shell.This is similar to running the exit command
Ctrl+L: Clear the screen. This is similar to running the “clear” command.

Ctrl+S: Stop all output to the screen. This is particularly useful when running commands with a lot of long, verbose output, but you don’t want to stop the command itself with Ctrl+C.
Ctrl+Q: Resume output to the screen after stopping it with Ctrl+S.

githubfoam

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The ".hcl" file extension is used for HashiCorp Configuration Language (HCL) files, which are used to define infrastructure as code using HashiCorp tools such as Vagrant and Packer.

In the context of Vagrant, the "pkr.hcl" file is used to define how Packer builds machine images that can be used as base boxes for Vagrant. The "pkr.hcl" file specifies the builders (e.g. virtualization providers like VirtualBox, VMware), provisioners (e.g. shell scripts, Ansible, Chef), and post-processors (e.g. compressing the image, uploading to a cloud provider) that Packer should use to create the machine image

The "pkr.hcl" file can also include variables, which allow for more dynamic and flexible configuration. These variables can be set via the command line, a separate variables file, or even environment variables.

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#=====================================================================
Docker Playground
https://www.katacoda.com/courses/docker/playground
Play with Docker
https://labs.play-with-docker.com/
#=====================================================================
/var/lib/docker/volumes/ #docker volumes stored in Docker host filesystem
/var/lib/docker #Docker daemon directory on Linux.
C:\ProgramData\docker #Docker daemon directory on Windows.
#=====================================================================

githubfoam

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#shortcuts ubuntu desktop mate
type to search - keyboard shortcuts

ctrl+alt+d minimize/maximize all windows
alt+F9 - minimize windows
ctrl+alt+l - lock screen
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#vmware workstation user authentication easy install bug, skip it
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githubfoam

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# ofed_info -s
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Find Mellanox Adapter Type and Firmware/Driver version
ConnectX-4 card

# lspci | grep Mellanox
0a:00.0 Network controller: Mellanox Technologies MT27500 Family [ConnectX-3]
# lspci -vv -s 0a:00.0 | grep "Part number" -A 3
# lspci | grep Mellanox | awk '{print $1}' | xargs -i -r mstvpd {}

githubfoam

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you are root and you allow existing user to connect passwordless
passwordless ssh

sudo su - alice
mkdir -p ~/.ssh && chmod 700 ~/.ssh
nano ~/.ssh/authorized_keys   # paste the single public-key line, save/exit
chmod 600 ~/.ssh/authorized_keys
exit