如何在ssh命令中转义报价

Question

I want to install a the pub key for user test using the command below.

I know the root password and the user test does not exist.

cat test.pub | ssh root@127.0.0.1 "useradd -m test || su - test -c 'umask 077; mkdir /home/test/.ssh; cat >> /home/test/.ssh/authorized_keys'"

But the command does not work.

Error: Creating mailbox file: File exists

Answer 1

The problem is useradd -m test . I delete user test by userdel test && rm -rf /home/test . It should be userdel -r test .

The command below works:

cat test.pub | ssh root@127.0.0.1 "useradd -m test && su - test -c 'umask 077; mkdir /home/test/.ssh; cat >> /home/test/.ssh/authorized_keys'"