Linux Ask! is a Q & A web site specific for Linux related questions. Questions are collected, answered and audited by experienced Linux users.
SSH takes a long time to connect or log in
Answer
If you experienced slow SSH connect to a remote server, you can try to disable the reverse DNS lookup at the server.
1. Edit the sshd_config
# sudo vi /etc/ssh/sshd_config
2. Add the following line in sshd_config
UseDNS no
3. Restart sshd
# sudo /etc/init.d/ssh restart
SSHMenu: SSH connections manager for GNOME
Answer:
SSHMenu is a GNOME panel applet* that keeps all your regular SSH connections within a single mouse click.
Highly recommended if you need to manage a lot of SSH sessions.
Official homepage: http://sshmenu.sourceforge.net/
Prevent go way SSH session killing running job
Answer:
If you are executing a long running job over SSH session, when your SSH session is terminated for whatever reason, e.g. unstable network connection. Your long running job will die (it will receive a hangup/hup signal) when the SSH session was killed.
To overcome this, when executing long running job over SSH, use the following way
nohup program &
How to install SSH server in Ubuntu?
Answer:
If you did not select to install the OpenSSH server during Ubuntu setup process, you can install afterward using the command
sudo apt-get install openssh-server
And make sure the OpenSSH server is running, by
sudo /etc/init.d/ssh restart
Reference: https://help.ubuntu.com/7.04/server/C/openssh-server.html
Should I use Telnet and FTP for remote access?
Answer:
In a word, No.
The problem with Telnet, FTP, and other non-encrypted protocols is that everything is sent across the network as plain text. This means that someone running a sniffing program on the network, which is very simple under many circumstances, can see all of your traffic - including your login and password.
Consider replacing Telnet and FTP with SSh.
