Paolo Redaelli- 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 dependant task 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 run last 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 not show 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
alt + -
- Completely clean and clear your terminal
reset
- Get CPU info quickly
cat /proc/cpuinfo
- Get memory info quickly
cat /proc/meminfo
- Find a text in a directory which has a lot of file in it recursively
grep -rn /etc/ -e text_to_find
- Find files bigger than 100 MB
find -type f -size +100MB -exec ls -lah {} \;Create a webserver in the current directory to serve files in it
python -m SimpleHTTPServer
Find your public IP
curl ifconfig.me
Get a tree view of folders only 3 level
tree -L 3
Get a tree view of processes
pstree
Use the last command’s arguments
!$