ow do I determine the system resource usage during of execution of a particular command on a Linux, OS X Unix, BSD and Unix-like operating system?
‘m a new Ubuntu Linux user and noticed that old kernel still exists in my system. Why doesn’t Ubuntu remove old kernels automatically? How do I delete old unused kernel images to free disk space. How to remove unused old kernel images on Ubuntu Linux safely?
know how to find out my SATA link speed such as 3.0 or 6.0 Gbps on Linux operating
system. How do I find out my SATA link speed on FreeBSD Unix operating system? How do I make sure my sata hard disk is working at 6Gbps speed and how do I verify this on a FreeBSD server hardware?
How can I find out information about a Linux container (LXC) such as CPU usage and memory usage from the command prompt? Is there is top command like a tool for lxc to monitor memory and cpu usage?
‘m a new FreeBSD Unix system user. How can I find out the process/programs names listing on a certain port on a FreeBSD Unix systems using command line? How do I lookup the process which is currently bound to the given network port on a FreeBSD server?
y OpenSSH server listing on TCP port number 2222. How can I use ssh-copy-id with an sshd server with listing on a different port on a Linux or Unix-like systems?
need to tunnel X Window securely over SSH bases session so that I run X program on my remote Linux/Unix server/workstation and get back display to my Apple Macbook pro laptop. I tried the ssh -X user@server1
and ssh -Y user@server2
commands on both OS X Mountain Lion and Apple OS X Mavericks/Yosemite. But, I am unable to use the ssh command with X11.
How do I fix this problem on OS X and enable X11 forwarding with ssh command? How do I install XQuartz (X11.app) server on Apple OS X Mountain Lion or Mavericks or Yosemite?