https://www.notion.so/Commands-for-Terminal-9f9f65c1bde74874a7e5582c101ca9e1
Useful Aliases
Add following aliases in your ~/.bash_profile
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alias ..='cd ..'
alias ...='cd ../../'
alias b='brew'
alias c='clear'
alias l='ls -lah'
alias su='sudo -i'
alias root='sudo -i'
How to parse JSON string in the terminal
Install jq via following link to parse the string.
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curl 'https://api.github.com/repos/jqlang/jq/commits?per_page=5' | jq '.[0]'
How to find the largest files or folders on a file system
To find the largest folders on a file system pass the -a option. This will change the behavior of du to write size counts for files as well as folders. Run the following as root to see the ten largest files or folders on a system. This can be useful if you are dealing with out-of-disk space issues on a system.
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du -a / | sort -n -r | head -n 10
5351116 /
2462616 /usr
2153492 /home
2153472 /home/george
1571924 /usr/lib
How to sort by file or folder size
To sort by file size pass the output of du to sort and use the -n (numeric) and -r (reverse) options.
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du ~/go | sort -n -r | less
170440 /home/george/go
132816 /home/george/go/src
74024 /home/george/go/src/github.com
57072 /home/george/go/src/golang.org
Open and close ports on RHEL 8 / CentOS 8
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sudo firewall-cmd --zone=public --list-ports
sudo firewall-cmd --zone=public --permanent --add-port 8080/tcp
sudo firewall-cmd --reload
sudo firewall-cmd --zone=public --permanent --remove-port 8080/tcp