A server is almost out of free memory and is becoming unresponsive.
Which of the following sets of commands will BEST mitigate the issue?
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A. B. C. D.D.
The best set of commands to mitigate the issue of a server almost out of free memory and becoming unresponsive is D. fdisk, mkswap, swapon -a.
Here's a detailed explanation of each command and how they help to mitigate the issue:
fdisk: This command is used to create, delete, and manipulate disk partitions on a Linux system. In this case, the fdisk command can be used to check the partition table and see if there is any unallocated space that can be used to create a new partition to increase the server's available storage space.
mkswap: This command is used to create a swap partition or file. A swap partition is an area on a hard drive that can be used by the operating system as extra memory when the system's RAM runs out of space. By creating a swap partition, we can increase the amount of memory available to the server, which can help mitigate the issue of low memory.
swapon -a: This command is used to activate all swap devices that are defined in /etc/fstab. By running this command, we can activate the swap partition that we created using the mkswap command. This will increase the amount of memory available to the server, which can help mitigate the issue of low memory and prevent the server from becoming unresponsive.
In contrast, the other answer choices are not as effective in mitigating the issue of low memory:
A. free, fack, partprobe: The free command displays the amount of free and used memory in the system. The fack command is not a valid command in Linux. The partprobe command is used to inform the OS of partition table changes. None of these commands directly address the issue of low memory.
B. lsof, lvcreate, mdadm: The lsof command lists all open files on the system. The lvcreate command is used to create a logical volume. The mdadm command is used to manage software RAID devices. None of these commands directly address the issue of low memory.
C. df, du, rmmod: The df command displays the amount of disk space used and available on the file system. The du command is used to estimate file space usage. The rmmod command is used to remove a module from the kernel. None of these commands directly address the issue of low memory.