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xclip:tldr:a79c7
xclip: Copy the output from a command to the X11 primary selection area (clipboard).
$ echo 123 | xclip
try on your machine
The command "echo 123" prints the string "123" to the standard output.
The "|" character is known as a pipe, and it is used to connect the standard output of one command to the standard input of another command. In this case, the output of the "echo 123" command is piped to the "xclip" command.
"xclip" is a command-line utility used to copy data from the standard input to the clipboard. By piping the string "123" to "xclip", the content "123" is copied to the clipboard.
So, the overall effect of the command "echo 123 | xclip" is to copy the string "123" to the clipboard.
This explanation was created by an AI. In most cases those are correct. But please always be careful and
never run a command you are not sure if it is safe.