X

Xclip - Copy content to x11 clipboard

Installation

• apt-get install xclip

Command

• Copy: xclip

• Paste: xclip -o

Using with SSH session

• By default, use $DISPLAY environment variable. Can be set using -d option

• Refer to X11 Forwarding at https://hatinfosec.wordpress.com/2021/03/12/linux-ssh-command/

Some Error

Can’t copy data from SSH session to host machine clipboard (not remote machine’s clipboard)

• Reason: by default, xclip use primary selection

• Solution: use xclip -selection clipboard or xclip -sel c

MacOS: Can copy data from SSH session (X11 Forwarding using xquartz) using xclip -sel c as in above case, but can’t paste it

• Reason: Pasteboard synching is not enabled

• Solution

  • Right Click at XQuartz -> Applications -> Customize

  • Then Under XQuartz menu -> Preferences (or Press Command ,)

  • Then Enable Synching

    • or Disable it, Close Preferences, then Reopen to enable it again.

XXD

• xxd creates a hex dump of a given file or standard input

• It can also convert a hex dump back to its original binary form.

Options

• -r: reverse

• -p: plain

• -ps: postscript

Example

kali@kali:~$ echo test | xxd -p
746573740a
                                                                                                                                                                                  
kali@kali:~$ echo "746573740a" | xxd -r -p
test

Reference

• https://www.tutorialspoint.com/unix_commands/xxd.htm

• https://manpages.ubuntu.com/manpages/trusty/man1/xxd.1.html