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This is a short summary of steps you can use to successfully build CentOS and Fedora images capable of take advantage of Openstack's elasticity. In the end, you'll have images that resize the root partition automatically and small enough to serve as base for your instances. I'm showing two different methods since for CentOS I used Linux rootfs resize and for Fedora I used cloud-utils-growpart. For
While administrating a box, you may wanted to find out what a processes is doing and find out how many file descriptors (fd) are being used. You will surprised to find out that process does open all sort of files: => Actual log file nixCraft is a one-person operation. I create all the content myself, with no help from AI or ML. I keep the content accurate and up-to-date. Your privacy is my top pri
How can I find all the file descriptors used by a process such as httpd (Apache web server) or mysqld (MySQL Database server)? You can use /proc file system or the lsof command to find all the file descriptors used by a process. nixCraft is a one-person operation. I create all the content myself, with no help from AI or ML. I keep the content accurate and up-to-date. Your privacy is my top priorit
I want to close an open port which is in listening mode between my client and server application. Is there any manual command line option in Linux to close a port? NOTE: I came to know that "only the application which owns the connected socket should close it, which will happen when the application terminates." I don't understand why it is only possible by the application which opens it ... But I'
[/donotprint]The /proc/sys/net/ipv4/tcp_fin_timeout setting determines the time that must elapse before TCP/IP can release a closed connection and reuse its resources. This is known as TIME_WAIT state. TIME_WAIT is a normal part of the TCP connection. However, if you must close a socket in TIME_WAIT state, try: nixCraft is a one-person operation. I create all the content myself, with no help from
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