[root@oradb iso]# mount -o loop /home/iso/CentOS-7-x86_64-DVD-1908.iso /mnt/cdrom
mount: /dev/loop0 is write-protected, mounting read-only
[root@oradb iso]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 8.6M 16G 1% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/mapper/centos-root 50G 1.2G 49G 3% /
/dev/mapper/centos-home 533G 14G 520G 3% /home
/dev/vda1 1014M 170M 845M 17% /boot
tmpfs 3.2G 0 3.2G 0% /run/user/0
/dev/loop0 4.4G 4.4G 0 100% /mnt/cdrom
[root@oradb yum.repos.d]# cat dvd.repo
[base]
name=CentOS
baseurl=file:///mnt/cdrom
enabled=1
gpgcheck=0
gpgkey=file:///mnt/cdrom/rpm-gpg/RPM-GPG-KEY-CentOS-7
[root@oradb yum.repos.d]# ll
total 4
drwxr-xr-x. 2 root root 187 Oct 12 12:57 bak
-rw-r--r--. 1 root root 120 Oct 12 12:57 dvd.repo
[root@oradb yum.repos.d]# pwd
/etc/yum.repos.d
[root@oradb yum.repos.d]# yum clean all
Loaded plugins: fastestmirror
Cleaning repos: base
Cleaning up list of fastest mirrors
[root@oradb ~]# cat /etc/redhat-release
CentOS Linux release 7.7.1908 (Core)
[root@oradb ~]# free -g
total used free shared buff/cache available
Mem: 31 0 16 0 14 30
Swap: 15 0 15
[root@oradb ~]# sar 1 5
-bash: sar: command not found
[root@oradb ~]# yum install sysstat*
Loaded plugins: fastestmirror
Determining fastest mirrors
base | 3.6 kB 00:00:00
(1/2): base/group_gz | 165 kB 00:00:00
(2/2): base/primary_db | 3.2 MB 00:00:00
Resolving Dependencies
--> Running transaction check
---> Package sysstat.x86_64 0:10.1.5-18.el7 will be installed
--> Processing Dependency: libsensors.so.4()(64bit) for package: sysstat-10.1.5-18.el7.x86_64
--> Running transaction check
---> Package lm_sensors-libs.x86_64 0:3.4.0-8.20160601gitf9185e5.el7 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
==============================================================================================================================================
Package Arch Version Repository Size
==============================================================================================================================================
Installing:
sysstat x86_64 10.1.5-18.el7 base 315 k
Installing for dependencies:
lm_sensors-libs x86_64 3.4.0-8.20160601gitf9185e5.el7 base 42 k
Transaction Summary
==============================================================================================================================================
Install 1 Package (+1 Dependent package)
Total download size: 357 k
Installed size: 1.2 M
Is this ok [y/d/N]: y
Downloading packages:
----------------------------------------------------------------------------------------------------------------------------------------------
Total 25 MB/s | 357 kB 00:00:00
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : lm_sensors-libs-3.4.0-8.20160601gitf9185e5.el7.x86_64 1/2
Installing : sysstat-10.1.5-18.el7.x86_64 2/2
Verifying : lm_sensors-libs-3.4.0-8.20160601gitf9185e5.el7.x86_64 1/2
Verifying : sysstat-10.1.5-18.el7.x86_64 2/2
Installed:
sysstat.x86_64 0:10.1.5-18.el7
Dependency Installed:
lm_sensors-libs.x86_64 0:3.4.0-8.20160601gitf9185e5.el7
Complete!
[root@oradb ~]# sar 1 5
Linux 3.10.0-1062.el7.x86_64 (oradb) 10/12/2020 _x86_64_ (12 CPU)
01:10:56 PM CPU %user %nice %system %iowait %steal %idle
01:10:57 PM all 0.33 0.00 0.33 0.00 0.00 99.33
01:10:58 PM all 1.00 0.00 2.34 0.00 0.08 96.57
01:10:59 PM all 3.19 0.00 7.46 0.00 0.00 89.35
01:11:00 PM all 0.25 0.00 0.25 0.00 0.00 99.50
01:11:01 PM all 0.41 0.00 1.58 0.00 0.08 97.93
Average: all 1.03 0.00 2.39 0.00 0.03 96.55