How did you do the Health check in Linux?

Question Posted / mahiforu

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How did you do the Health check in Linux?..

Answer / lokesh

Top :

Top Command can provide the top processes, CPU Load, Memory
Utilization, Swap Utilization, Running/Zombie Process,
Uptime, etc..

iostat:

This command will provide the information about the disk
utilization, Read/Write rate, etc..

vmstat:

vmstat command provides the swap memory utilization report.

sar (System Activity Reporter):

sar tool can provide the report about CPU Load, iowait and
other useful info at specified intervals.

dmesg:

dmesg command displays all the server errors including
Hardware, booting, network errors

This command will retrieve the information from log files
which located in /var/log

Other Useful commands to collect some info about the
server :

runlevel – To Know the Current Run Level

netstat –a – To see the Network sessions

netstat –rn – To View the gateways configured

who / finger – To View the Users logged in detail

ps –ef – To view all the running process and its related
files

sestatus – To check SELINUX status

service iptables status – To check firewall status

ifconfig –a – To View the Network cards and IP Address
configured

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