Helpful Commands for Daily Use
Disk usage
df -h
Find Size of a Dir and its content
du -hs /path/to/dir
Find Size of a Dir individual folders and sort by size
du -h | sort -h
Add user to sudoers file
su root
nano /etc/sudoers
Then add the user below admin user like below syntax.
{YOUR_USERNAME} ALL=(ALL) ALL
use SUDO without password prompt for current user
sudo visudo
In the bottom of the file, add the following line:
$USER ALL=(ALL) NOPASSWD: ALL
Check port usage
sudo lsof -i :8000
Trigger Kubernetes Job from CronJob
kubectl create job --from=cronjob/<cronjob-name> <job-name-to-be-created> -n <namespace-name>
Find the current connection slot usage and limits in PostgreSQL
select max_conn, used, res_for_super,((max_conn - res_for_super)-used) as res_for_normal
from
(select count(*) used from pg_stat_activity) t1,
(select setting::int res_for_super from pg_settings
where name='superuser_reserved_connections') t2,
(select setting::int max_conn from pg_settings where name='max_connections') t3
Enable COPY PASTE between HOST machine and Virtualbox machine
https://codetryout.com/vbox-guest-additions-ubuntu-22/
Kdenlive Noise Suppressor Plugin for Ubundu
https://kentwest.neocities.org/westk/librnnoise
Export all env vars from .env before running a script
export $(cat .env | xargs) && python main.py