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Linux cheatsheet
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# Add Docker's official GPG key: | |
sudo apt-get update | |
sudo apt-get install ca-certificates curl | |
sudo install -m 0755 -d /etc/apt/keyrings | |
sudo curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.asc | |
sudo chmod a+r /etc/apt/keyrings/docker.asc | |
# Add the repository to Apt sources: | |
echo \ | |
"deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/ubuntu \ | |
$(. /etc/os-release && echo "$VERSION_CODENAME") stable" | \ | |
sudo tee /etc/apt/sources.list.d/docker.list > /dev/null | |
sudo apt-get update |
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# Open a screen session, create a new window, and start a shell in that window: | |
screen | |
# Start named session: | |
screen -S session_name | |
# Reattach screen: | |
screen -r $SCREEN_ID | |
# List running screens: | |
screen -ls | |
# Shortcuts: | |
# `Ctrl+a ?` List screen commands | |
# `Ctrl+a c` Create a new window (with shell) | |
# `Ctrl+a "` List all window | |
# `Ctrl+a 0` Switch to window 0 (by number) | |
# `Ctrl+a A` Rename the current window | |
# `Ctrl+a S` Split current region horizontally into two regions | |
# `Ctrl+a |` Split current region vertically into two regions | |
# `Ctrl+a tab` Switch the input focus to the next region | |
# `Ctrl+a` Toggle between the current and previous region | |
# `Ctrl+a Q` Close all regions but the current one | |
# `Ctrl+a X` Close the current region | |
# `Ctrl+a d` Detach screen |
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# Check disk usage per use | |
sudo du -sh /home/* | sort -h |
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