What do the “buff/cache” and “avail mem” fields in top mean?
Within the output of top, there are two fields, marked “buff/cache” and “avail Mem” in the memory and swap usage lines:
linux
How to run a fresh version of AIX in a Virtual Machine with a Linux host?
I need to learn about AIX, and I only have a laptop with Fedora 14/VirtualBox on it. Is there any chance that I could run an AIX guest in my VirtualBox?
How to know number of cores of a system in Linux?
I wanted to find out how many cores my system has, so I searched the same question in Google. I got some commands such as the lscpu command.
When I tried this command, it gave me the following result:
Why do my SATA devices show up under /proc/scsi/scsi?
I have 3 SATA devices on my system. They show up under /proc/scsi/scsi, although these are not SCSI devices. Why do my SATA devices show up under the SCSI directory?
How to change filesystem UUID (2 same UUID)?
I have a fedora guest OS in VMware. I want to expand /boot partition, so I add another virtual disk to this VM, and try to clone the disk.
Is there a way to set the size of the history list in bash to more than 5000 lines?
No matter how much I set the HISTSIZE environment variable to be larger than 5000, when printing the history list with the history builtin, it prints only the last 5000 commands.
I need that because I often have a large .bash_history which exceeds 5000 lines, and sometimes one needs to address an early command by pressing Ctrl-R, but if that command is more than 5000 commands earlier, I can’t access it using that mechanism. I know I can use grep on the .bash_history, but I think the Ctrl-R mechanism would be much more faster (and convenient). I use gnu bash version 4.1.
How to see process created by specific user in Unix/linux
I want to see list of process created by specific user or group of user in Linux
Can I do it using ps command or is there any other command to achieve this?
Why doesn’t mount respect the read only option for bind mounts?
On my Arch Linux system (Linux Kernel 3.14.2) bind mounts do not respect the read only option
Why does swappiness not work?
We have a RHEL 7 machine, with only 2G of available RAM:
Shell: how to go to the beginning of line when you are inside a screen?
I am inside a screen (screen -Ra). I have a long command, and I am at the end. Instead of keeping the left arrow, how can you go to the beginning of the line?