linux-commands-notes

My useful linux commands that some times I need to use.

Basics commands line on vi bash Linux

• Ctrl + A: go to the beginning of line
• Ctrl + E: go to the end of line
• Ctrl + F: move forward one character
• Ctrl + B: move backward one character

check process running

ps -aux

troubles to get any service up and running because of port use conflict

ps -aux | grep ${PORT} sudo kill <PID>

Search some text inside of files

grep -rnw '/path/to/somewhere/' -e 'pattern'

• -r or -R is recursive,
• -n is line number, and
• -w stands for match the whole word.
• -l (lower-case L) can be added to just give the file name of matching files.

Find a directory on SO

find / -type d -name {directory-name}

Check the version of SO

cat /etc/os-release

Install nodeJs, npm on Fedora

https://www.e2enetworks.com/help/knowledge-base/how-to-install-node-js-and-npm-on-centos/

Resolve ssh conection close

.ssh/config

TCPKeepAlive yes
ServerAliveInterval 30

Disk commands

• 1 - Run lsblk to list available blocks (volumes) and note the volume size / names
• 2 - Run sudo growpart /dev/volumename 1 on the volume you want to resize, in our case it was sudo growpart /dev/xvda 1
• 3 - Run sudo resize2fs /dev/xvda1 to expand file system
• 4 - Check new size with df -h command

Change Disk size on Amazon volume

https://support.amimoto-ami.com/english/self-hosting-accounts/increasing-your-ec2-volume-size

SSH

ssh -i "key.pem" server-user@server-ip