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How to monitor disk performance on RHEL or CentOS 7 ? iotop : Watches I/O usage information output by the Linux kernel (requires 2.6.20 or later) and displays a table of current I/O usage by processes or threads on the system. At least the CONFIG_TASK_DELAY_ACCT, CONFIG_TASK_IO_ACCOUNTING, CONFIG_TASKSTATS and CONFIG_VM_EVENT_COUNTERS options need to be enabled in your Linux kernel build configuration. iotop displays columns for the I/O bandwidth read and written by each process/thread during the sampling period. It also displays the percentage of time the thread/process spent while swapping in and while waiting on I/O. For each process, its I/O priority (class/level) is shown. [root@localhost ~]# iotop Total DISK READ :       0.00 B/s | Total DISK WRITE :       0.00 B/s Actual DISK READ:       0.00 B/s | Actual DISK WRITE:       0.00 B/s    TID  PRIO  USER  ...

H ow to mount NTFS (Windows) partition on RHEL or CentOS 7 ? Here for this tutorial i am using CentOS 7 OS, Because you can easily find many open source 3rd party repos to install your any software with its dependency, just in one click. Or If you are working on RHEL then you can get all the required packages from these two sites, 1. Before downloading fuse & ntfs-3g we will have to install EPEL (Extra Packages for Enterprise Linux) repository: # yum --enablerepo=extras install epel-release Or directly install : # rpm -ivh https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm 2. Install "fuse" and "ntfs-3g" packages: # yum install ntfs-3g fuse 3. Once both of these packages are installed, create a mount directory where we are planning to mount NTFS partition or disk: # mkdir /mydisk-ntfs 4. To mount NTFS disk partition temporarily, you should get to know the NTFS device name in my case it's "/dev/sdb1"...

How to configure 3rd Party Yum Repo's ? 1. Configuring RPM Forge Repo: # wget http://repository.it4i.cz/mirrors/repoforge/redhat/el7/en/x86_64/rpmforge/RPMS/rpmforge-release-0.5.3-1.el7.rf.x86_64.rpm # rpm -ivh rpmforge-release-0.5.3-1.el7.rf.x86_64.rpm # yum clean all # yum repolist   2. Configuring EPEL Repo EPEL was started because many Fedora contributors wanted to use the Fedora packages they maintain on Red Hat Enterprise Linux (RHEL) and its compatible derivatives. # rpm -ivh https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm # yum repolist [root@localhost ~]# yum repolist Loaded plugins: fastestmirror, langpacks Loading mirror speeds from cached hostfile  * base: centos.mirrors.estointernet.in  * epel: sg.fedora.ipserverone.com  * extras: centos.mirrors.estointernet.in  * rpmforge: mirrors.tuna.tsinghua.edu.cn  * rpmforge-extras: mirrors.tuna.tsinghua.edu.cn  * updates: centos.mirrors.estoi...