Yes, you can use the bind command
bind '"\ey"':"\"less \C-m\""
That maps Alt-e to the less command and execute it (with the \C-m aka Ctrl-m )
Probably for the | you need to escape it.
bind '"\ey"':"\"\|less \C-m\""
If you want to just append it to the command line remove the *\C-m\""
Be careful as there are already some bindings defined:
Ctrl + A Go to the beginning of the line you are currently typing on
Ctrl + E Go to the end of the line you are currently typing on
Ctrl + L Clears the Screen, similar to the clear command
Ctrl + U Clears the line before the cursor position. If you are at the end of the line, clears the entire line.
Ctrl + H Same as backspace
Ctrl + R Let’s you search through previously used commands
Ctrl + C Kill whatever you are running
Ctrl + D Exit the current shell
Ctrl + Z Puts whatever you are running into a suspended background process. fg restores it.
Ctrl + W Delete the word before the cursor
Ctrl + K Clear the line after the cursor
Ctrl + T Swap the last two characters before the cursor
Esc + T Swap the last two words before the cursor
Alt + F Move cursor forward one word on the current line
Alt + B Move cursor backward one word on the current line
Tab Auto-complete files and folder names
The Control key, as you can see above, is made with C-m , so you can start the less command with Ctrl-g, as follow:
bind '"\C-g"':"\"\|less *\C-m\""
To get the key codes for the Alt (only for the ALT), you can use the read command from the shell:
^[y is equal to \ey
For more info, this question was answered also in stackoverflow: