Configuration and Tuning of OS Services While applying system updates and patches helps correct known vulnerabilities, one of the best ways to protect the system against as yet unreported vulnerabilities is to disable all services that are not required for normal system operation. This prevents the...
Beginners Lessons / Linux Admin / Linux Disk Management / Linux LVM
by Yogesh Raheja · Published February 8, 2022
1.) What LVM is? 2.) Terminology 3.) Creation of Physical Vol, Volume Group, Logical Volume, Filesystem creation, Mount and making the FS entry in /etc/fstab 4.) Add new disk under existing Volume Group 5.) Filesystem extension in Linux 6.) Filesystem shrinking in Linux 7.) Removing disk...
Solaris TCP/IP allows multiple logical interfaces to be associated with a physical network interface. This allows a single machine to be assigned multiple IP addresses, even though it may have only one network interface. In Solaris 8 and above you can go greater than 256 (...
Check current memory status of all modules: [root@gurkulrhel7 ~]# more /sys/devices/system/memory/memory*/state :::::::::::::: /sys/devices/system/memory/memory0/state :::::::::::::: online :::::::::::::: /sys/devices/system/memory/memory1/state :::::::::::::: online :::::::::::::: /sys/devices/system/memory/memory2/state :::::::::::::: online :::::::::::::: /sys/devices/system/memory/memory3/state :::::::::::::: online :::::::::::::: /sys/devices/system/memory/memory4/state :::::::::::::: online :::::::::::::: /sys/devices/system/memory/memory5/state :::::::::::::: online :::::::::::::: /sys/devices/system/memory/memory6/state :::::::::::::: online :::::::::::::: /sys/devices/system/memory/memory7/state :::::::::::::: online [root@gurkulrhel7 ~]# If...
The dlpiping utility exchanges network traffic over a specific DLPI network device to test network connectivity. Each host on the network being tested should run an instance of dlpiping in server mode to reflect packets from the other hosts. An instance of dlpiping in client mode...
Beginners Lessons / Solaris Beginners Guides / Unix Beginners / Video Learning / Video Posts
by Ramdev · Published February 4, 2022
1. What port does the Apache web server run on? What about HTTPS? 1a. Apache uses port 80 for HTTP and port 443 for HTTPS. 2. Are additional packages besides httpd required for a secure website? If so, what are they? 2a. Yes. For Apache to run...
There are three standard file descriptors: stdin 0 – Standard input to the program. stdout 1 – Standard output from the program. stderr 2 – Standard error output from the program. Normally, input is from the keyboard or a file. Output, both stdout and...
The General problem that we see in an enterprise environment, where there is no centralized automated password management tool is …. missing root passwords for the servers. Missing root passwords are also common when the servers initially managed by one team and later handed over to...
Blog for Unix Admin / Solaris Admin / Solaris Disk Management
by Ramdev · Published January 31, 2022
Moving a file system normally involves dismounting the file system, backing it up to tapes, and restoring it to a new partition. You may also copy the file system from one place to another while it is unmounted. This process could take a significant amount of...
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