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sar output for Yesterday statistics
To check the load: sar -q -f /var/log/sa/sa$(date +%d -d yesterday) To check the CPU status: sar -p -f /var/log/sa/sa$(date +%d -d yesterday) To check the Swap Space usage: sar -S -f /var/log/sa/sa$(date +%d -d yesterday) To check the RAM memory usage: sar -r -f /var/log/sa/sa$(date +%d -d yesterday)
Disk Extend EXT2/3/4 and XFS root partition without LVM
Disk Extend EXT2/3/4 and XFS root partition without LVM Looking for steps to grow your KVM VM/Container’s partition after extending root OS size or extending ext2/3/4 and XFS root partition without LVM at runtime. Steps to extend root partition without LVM are quite easy and can be followed without going into many technical details. This…
Enable root Access for Linux Instances
AWS doesn’t grant root access by default to EC2 instances. This is an important security best practise. Users are supposed to open a ssh connection using the secure key/pair to login as ec2-user. Users are supposed to use the sudo command as ec2-user to obtain elevated privileges. Problems arise with a number of software packages…
How to automatically clean up /tmp directory contents in Linux?
How to automatically clean up /tmp directory contents in Linux? Every Linux system has a directory called /tmp which has mounted with separate file system. It has special filesystem called tmpfs. It’s a virtual filesystem and operating system will automatically mount /tmp mount point while system booting. If you want to mount /tmp directory separately as…
Safely Removing virtfs on a cPanel Server
If you’re on a cPanel server, you’ve probably noticed a sizable folder called ‘virtfs’ sitting in /home, which would appear at first to be using a ton of space. Your first inclination might be to delete it, but don’t! Most likely, the files in that folder are actually just hard links or bind mounts and…
How to Check and Upgrade your Linux Kernel Version via Command Line in CentOS 7
This article describes how to check and upgrade the Linux kernel in OpenVZ, KVM, and Dedicated Servers (including the CloudLinux platform). Checking the Kernel Version To check system parameters such as the kernel version and build date, OS architecture, hostname, etc., you can use the uname command, which is included in coreutils package: # uname -rv 3.10.0-693.11.6.el7.x86_64 #1 SMP Thu Jan…
