Run the last command as root | sudo !!
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Serve current directory tree at http://$HOSTNAME:8000/ | python -m SimpleHTTPServer
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Runs previous command but replacing | echo "Hello Morld"
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| | ^Morld^World
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| | echo "Hello World"
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Rapidly invoke an editor to write a long command | [ctrl+x e]
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Place the argument of the most recent command on the shell | 'ALT+.' or '<ESC> .'
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Salvage a borked terminal | reset
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List currently mounted filesystems in nice layout | mount | column -t
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Get your external IP address | curl ifconfig.me
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Execute a command at a given time | echo "ls -l" | at midnight
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Output your microphone to a remote computer's speaker | dd if=/dev/dsp | ssh -c arcfour -C username@host dd of=/dev/dsp
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Type partial command, check something, resume typing | vi /etc/ssh/ [ctrl+u]
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| | ls -lisa /etc/ssh/
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| | [ctrl+y] vi /etc/ssh/ssh_config
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Mount folder/filesystem through SSH | sshfs name@server:/path/to/folder /path/to/mount/point
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Mount a temporary ram partition | mount -t tmpfs tmpfs /mnt -o size=1024m
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Download an entire website | |
Clear the terminal screen | [ctrl+l]
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Compare a remote file with a local file | ssh user@host cat /path/to/remotefile | diff /path/to/localfile -
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Update twitter via curl | |
SSH connection through host in the middle | ssh -t reachable_host ssh unreachable_host
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Close shell keeping all subprocess running | disown -a && exit
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Make 'less' behave like 'tail -f' | less +F somelogfile
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Put a console clock in top right corner | while sleep 1;do tput sc;tput cup 0 $(($(tput cols)-29));date;tput rc;done &
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Shutdown a Windows machine from Linux | net rpc shutdown -I ipAddressOfWindowsPC -U username%password
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List of commands you use most often | history | awk '{a[$2]++}END{for(i in a){print a[i] " " i}}' | sort -rn | head
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32 bits or 64 bits? | getconf LONG_BIT
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Set audible alarm when an IP address comes online | ping -i 60 -a IP_address
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Reboot machine when everything is hanging | <alt> + <print screen/sys rq> + <R> - <S> - <E> - <I> - <U> - <B>
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Simulate typing | echo "You can simulate on-screen typing just like in the movies" | pv -qL 10
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Quickly rename a file | mv filename.{old,new}
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Escape any command aliases | \[command]
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Delete all files in a folder that don't match a certain file extension | rm !(.foo|.bar|*.baz)
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