linuxCommands.sh

ufw status # list firwall status
ufw allow 81/tcp  # open 81 port
ufw deny 81/tcp   # deny 81 port
ufw delete allow 81/tcp # Delete 81 port rule
ufw delete deny 81/tcp # Delete 81 port rule


netstat -tulpn  # list processes assigned to port 


netstat -tnpa | grep 'ESTABLISHED.*sshd' # Active ssh sssions
watch -n 5 free -m # RAM used

ls -halt # list files with dates in human readable
ls -sh   # lists files with size in human readable

gzip -k forever.log # compress file without deleting original 

mongodump --out /data/db/backup # dump mongodb
tar -zcvf db-backup.tar.gz /data/db/backup # gzip backup

# Restore db
tar -xvzf db-backup.tar.gz
mongorestore --db newdbname backup/backupdbname

# drop existing db and than restore
mongorestore --drop --db workawesome dump2019/workawesome


# scp commands supports config file
scp waco:/root/db-backup-2019.tar.gz /Users/om/desktop
scp /Users/om/desktop/db-backup.tar.gz waco2019:/root/db-backup-2019.tar.gz


cron start # start cronjobs
crontab /resources/cronfile # Add conrfile to process, by default you can create file inside /etc/cron.d/


npm get prefix // command to get global node instalation path

# Create symbolic links in osx, always provide absolute path
ln -s /Users/om/bash/some-script.sh /usr/local/bin/some-script

#start nginx
systemctl start nginx 
nginx -s reload
nginx -s stop