Linux CENTOS7 Daily Operations-use W to view system loads, vmstat commands, top commands, SAR commands, nload commands

One, use W to view the system load

W, uptime View system load, 0.00 means 1 minutes load 0

Cat/proc/cpuinfo View CPU Cores

Second, Vmstat command, view process, CPU, memory, swap, IO, system

R, SWPD, Si, so, Bi, bo, US, WA

Dynamic display 5 times per second

Run, block process waits, swap partition memory is not enough to put,

Si/so how many kilobytes of data from swap into/out memory, Bi/bo read/write memory from disk, US user consumes CPU percentage, does not exceed 100,id idle, WA waits wait

Third, top

Top view process usage resources, updated 3 seconds

Top-c Show detailed process information

Top-bin1 static display of all processes

Q Exit, number 1 shows all cores cpu,m sorted by memory usage

Large p sorted by CPU usage

Iv. SAR Command

[email protected] ~]# Yum install-y sysstat

Sar-n DEV 1 5 network card traffic

SAR-Q System Load

Sar-b Disk Read and write

Sar-f/var/log/sa/sa08 View # No. 08 History file

V. nload command

Yum Install-y epel-release

Yum install-y nload

Linux CENTOS7 Daily Operations-use W to view system loads, vmstat commands, top commands, SAR commands, nload commands