linux shit

0 linux shit.txt

pip 3 install:
wget https://bootstrap.pypa.io/get-pip.py
sudo python get-pip.py
nano ~/.bashrc
// add at the end of file :
alias pip="pip3"
reset terminal

sudo passwd

su

apt update && apt upgrade -y 

sudo apt install python-is-python3 -y

sudo apt install python3-pip -y


sudo apt install ffmpeg

pip install jupyterlab

df -h  // shows free space

top // press shift+f -> up/down arrows -> s -> enter -> q

// upload things :

curl --upload-file ./hello.txt https://transfer.sh

 // when low on memory:
pip --no-cache-dir install matplotlib

//add virtual memory:


https://www.cyberciti.biz/faq/linux-add-a-swap-file-howto/
https://linuxize.com/post/create-a-linux-swap-file/

sudo fallocate -l 1G /swapfile  // <- 1Gb of mem
sudo dd if=/dev/zero of=/swapfile bs=1024 count=1048576   // <- 1048576 = 1024 * 1024 = 1gb of mem
sudo chmod 600 /swapfile
sudo mkswap /swapfile
sudo swapon /swapfile1

//remote bash

apt install ncat
ncat -lvnp 5555 -e /bin/bash  // <- host connection on port 5555
ncat 192.168.2.1 5555 // <- connect to remote host

//reset bash

hash -r

// clear trash

rm -rf ~/.local/share/Trash/*

// cron +python
need to add ⌄
#!/usr/bin/env python3 
at top of python file
then to edit cron job
crontab -e
exec python every hour:
0 * * * * cd /medcheck/medcheck && ./check_for_updates.py >> /medcheck/medcheck/cron.log 2>&1
every minute:
* * * * * cd /medcheck/medcheck && ./check_for_updates.py >> /medcheck/medcheck/cron.log 2>&1

>> /medcheck/medcheck/cron.log 2>&1  //saves log to cron.log

 cd /medcheck/medcheck && ./check_for_updates.py  // cd to dir then run the py script

sources:
https://www.howtogeek.com/101288/how-to-schedule-tasks-on-linux-an-introduction-to-crontab-files/
https://www.geeksforgeeks.org/how-to-schedule-python-scripts-as-cron-jobs-with-crontab/
https://unix.stackexchange.com/questions/38951/what-is-the-working-directory-when-cron-executes-a-job

cron.md

cron +python

need to add

#!/usr/bin/env python3

at top of python file

make .py file accesiable:

sudo chmod +x my_script.py

then to edit cron job

crontab -e

exec python every hour:

0 * * * * cd /medcheck/medcheck && ./check_for_updates.py >> /medcheck/medcheck/cron.log 2>&1

every minute:

* * * * * cd /medcheck/medcheck && ./check_for_updates.py >> /medcheck/medcheck/cron.log 2>&1

>> /medcheck/medcheck/cron.log 2>&1 //saves log to cron.log

cd /medcheck/medcheck && ./check_for_updates.py // cd to dir then run the py script

sources:

https://www.howtogeek.com/101288/how-to-schedule-tasks-on-linux-an-introduction-to-crontab-files/

https://www.geeksforgeeks.org/how-to-schedule-python-scripts-as-cron-jobs-with-crontab/

https://unix.stackexchange.com/questions/38951/what-is-the-working-directory-when-cron-executes-a-job

cron with path (envs) working:

15 16 * * * export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin && cd /forsenmcv3 && ./forsen_mc3.py >> /forsenmcv3/cron.log 2>&1

tmux.md

create
tmux