Notes on Petrov

Job notes

Sun, 01 Mar 2026 00:00:00 +0000

Introduction Link to heading

Pozdravljeni,

sem Nikola Petrov, končujem študij Računalništvo in informacijske tehnologije in trenutno čakam na zagovor diplome.

Vaš oglas me je zelo pritegnil, ker me to področje še posebej zanima. Zato se z velikim interesom prijavljam na razpisano delovno mesto.
Prav tako tudi že imam nekaj delovnih izkušenj na tem področju, kar je razvidno v priloženem CV v priponki.

Vesel bom vašega povabila na razgovor.

Linux utils

Thu, 02 Jan 2025 00:00:00 +0000

.desktop file location Link to heading

~/.local/share/applications
/usr/share/applications

nvim Link to heading

The Releases page provides pre-built binaries for Linux systems.

curl -LO https://github.com/neovim/neovim/releases/latest/download/nvim-linux64.tar.gz
sudo rm -rf /opt/nvim
sudo tar -C /opt -xzf nvim-linux64.tar.gz

After this step add this to ~/.bashrc:

export PATH="$PATH:/opt/nvim-linux64/bin"

For sudo acces

sudo ln -s /opt/nvim-linux64/bin/nvim /usr/bin/

Open default file explorer Link to heading

xdg-open .

See memory usage Link to heading

htop

Find Link to heading

find -name <file_name> # Search files by name
find -type d -name <file_name> # Search directory name

To upgrade all Link to heading

sudo apt-get upgrade

zoxide better cd Link to heading

https://github.com/ajeetdsouza/zoxide

Connect MPI system over SSH for Dummy

Wed, 01 Jan 2025 00:00:00 +0000

On all computers

sudo apt install openssh-client
sudo apt install openssh-server
sudo apt install openmpi-bin libopenmpi-dev

Disable firewall

sudo ufw status
sudo ufw disable

Try connecting master to every slave ( you will need password )

ssh user@ipslave1
ssh user@ipslave2

On master generate a key and put it on the slaves

ssh-keygen -t rsa

ssh-copy-id user@ipslave1
ssh-copy-id user@ipslave2

Try connecting master to every slave ( you will not need password )

ssh user@ipslave1
ssh user@ipslave2

Compile program

mpicc main.c -o main
mpic++ main.cpp -o main

Copy main in to /tmp folder for easy same location ( program needs to be in the same path on all computers )

cp /path/to/main /tmp/mympiprogram/

Copy program to all computers
- Could use NFS server for auto copy

scp <source> <destination>
scp /tmp/mympiprogram/main user@ipslave1:/tmp/mympiprogram/main
scp /tmp/mympiprogram/main user@ipslave2:/tmp/mympiprogram/main

Run program
- num < c1 + c2 + c3
- c1 is number of processes that can run on the computer
- num is number of processes that are needed for the program

mpirun -np <num> --host 127.0.0.1:<c1>,ipslave1:<c2>,ipslave2<c3> /tmp/mympiprogram/main

Enable firewall

sudo ufw status
sudo ufw enable