Reference to get around

reference.md

Reference to get around

Screen

screen -S <session_name>
screen -ls
screen -r <attach_to_session>
Ctrl + A and then D to detach
screen -X -S <screen session> quit
# Enabled scrolling in screen. Add following lines in ~/.screenrc
# Enable mouse scrolling and scroll bar history scrolling
termcapinfo xterm* ti@:te@

Docker

Install docker https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-on-ubuntu-20-04

# Running containers
docker ps
# Copying files
docker cp containerId:source_path destination_path
# Access other cmd as user
sudo chmod 666 /var/run/docker.sock

Tmux

Rsync

rsync -avz hostname:/file/path .

SSH

• To keep SSH connection alive

# Add this to ~/.ssh/config
Host *
    ServerAliveInterval 240
    ServerAliveCountMax 2

AWK

• Extract between multiple lines matching a start and an end pattern: bash awk '/start/,/end/' <file>

Initial config on new VM

sudo apt update && sudo apt upgrade -y && sudo apt install -y git vim-gtk3 build-essential

Python

• VENV:

python3 -m venv venv
source venv/bin/activate
python3 -m pip install --user --upgrade pip

• Switch Python versions:

ls /usr/bin/python*
sudo update-alternatives --list python
sudo update-alternatives --install /usr/bin/python python /usr/bin/python2 1
sudo update-alternatives --install /usr/bin/python python /usr/bin/python3 2
sudo update-alternatives --config python

Git

# In order to switch to a remote branch, make sure to fetch your remote branch with “git fetch” first. You can then switch to it by executing “git checkout” with the “-t” option and the name of the branch.
$ git fetch
$ git checkout -t <remote_name>/<branch_name>

# Moving repos around
git remote set-url origin <new-repo-url>
git push

# Undo git add
git reset

# Undo git commit before push
git reset --soft --HEAD~2

# Move git repo retaining history
git clone https://sourceRepoURL
cd sourceRepoFolder
git push --mirror https://targetRepoURL

# Create a standalone patch
git add . 
git commit -m <message>
git format-patch -1

Linux stuff

• wget: Unable to resolve host address xxx wget --no-proxy --no-check-certificate
• Always use ls --color=auto to avoid issues with weird characters when piping ls into a file
• Copy ssh to remote server ssh-copy-id -i ~/.ssh/id_rsa.pub login@serverIP
• Enable bash on login servers

  if [ -f ~/.bashrc ]; then
    . ~/.bashrc
  fi

Nvidia profiling

• sudo -E env PATH=$PATH ncu --metrics lts__t_request_hit_rate --log-file output ./bfs.out ../../data/bfs/graph65536.txt

ML Environment

Windows

• To add a new env to jupyter

# Create a new env
$ conda create -n new_env -y
# Install ipykernel and add the env
$ pip install ipykernel
$ ipython kernel install --user --name=new_env
# Remove an environment
jupyter kernelspec uninstall env_name

• To enter jupyer "jupyter lab --no-browser" on WSL2