My ubuntu disconnects after a while (a few minutes), after it working perfectly. I invariably had to do a “/etc/init.d/networking restart”. Not only can I not ssh to it (or vnc via ssh tunneling per my previous post), but existing ssh connections get disconnected with a “broken pipe” error (which tend to just mean it’s […]
vnc is insecure by nature. Thus, use it through ssh tunneling: ssh -L 999:localhost:5900 <—on local host port 999, listen for local connections, and “bind it to remote host’s localhost:5900 (remote host’s localhost = remote host). Now, vnc to localhost port 999. It’ll go through ssh’s port 22.
sed ‘s/n//g’ <–does not work Because sed reads input a line at a time, and thus, won’t see n See http://backreference.org/2009/12/23/how-to-match-newlines-in-sed/
If you try to connect from a remote machine to a particular db and get the following: is not allowed to connect to this MySQL serverCsed by foreign host. (connect, as in telnet 3306) Need to set permissions, after logging onto mysql prompt as root: mysql -u root (supply password, if any) GRANT ALL PRIVILEGES […]
edit /etc/sudoers or whatever softlink it points to. You can do so by: 1. (dangerous way, NOT recommended) chmod the sudoers file. MAKE SURE YOU DO THIS AS ROOT AND NOT SUDO CHMOD, since this will lock you out (sudoers file need to be at 440 permission in order for sudo to work, i.e. once […]
Put machine A’s ~/.ssh/id-rsa.pub’s content in machine B’s ~/.ssh/authorized_keys You can do so with: ssh-copy-id -i ~/.ssh/id_rsa.pub user@<machine b’s hostname> by the way, the id-rsa.pub can be created with ssh-keygen.