How to pipe a Y or yes to a program while invoking with sudo?
We can type like this
yes | command
yes | yum update
How to pipe the y from yes into a program via sudo like the following?
yes| sudo command
The y from yes is be passed into command and should go into sudo and sudo shall ask for password normally. How can I do this?
sudo reads the password from the terminal directly, not from its standard input, unless the -S option is used. Thus
yes | sudo command
should prompt for the password (if necessary), without reading from yes, then run command as root with its standard input fed from yes’s standard output.
If that doesn’t work, you can run the whole pipeline under sudo using something like
sudo sh -c "yes | command"
yes | sudo command not passing y to command although sudo is asking for password. sudo sh -c "yes | command" is working fine. But is there a way to do the same without invoking another child shell explicitly?
– Abhik Bose
Dec 15 '17 at 13:50
sudo (yes | sudo command), then you need something else to set a pipe up for you; sudo itself can’t do that, so you need a subshell to do it for you (sudo sh -c "yes | command").
– Stephen Kitt
Dec 15 '17 at 14:18
