Very useful and not much known Linux commands that you probably aren’t using in your daily life

Ömer KARABACAK

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Apr 9, 2021

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• redo the last command but as root

sudo !!

• open an editor to run a command (probably a long one)

ctrl + x + e

• create a super-fast disk for IO dependent tasks to run on it

mkdir -p /mnt/ramdisk && mount -t tmpfs tmpfs /mnt/ramdisk -o size=8192M

• don’t add the command to the history (add one space in front of the command)

 ls -l
history # check the history

• Fix or change a really long command that you last ran with a text editor

fc

• create a tunnel with SSH to port that is not open to the public (local port 8080 -> remote host’s 127.0.0.1 on port 6070)

ssh -L 8080:127.0.0.1:6070 root@my-public-server.com -N

• Log output but don’t show it on the console

cat somefile | tee -a log.txt | cat > /dev/null

• Exit terminal but leave all processes running

disown -a && exit

• Clear your terminal without “clear” command

ctrl + l  # L

• Paste the arguments of the previous command