Linux tools for measuring disk i/o etc

Question

I need to measure the utilization of following resources on RedHat and CentOS during my performance testing. Please suggest the best tools

• Memory usage
• CPU usage
• Disk I/O
• Network I/O

Answer 1

Memory Usage :

free is great, but htop will actually answer your CPU usage question, also.

For Disk I/O, iotop is probably what you want - but there is also iostat , atop and glances

As for Network I/O - I prefer slurm - but there is also iftop

But there are literally tons of tools at your disposal, and they each have their own pros and cons - I've given you my favorites, but there are plenty more that you may like even more than the ones I've mentioned, thus far.

So, do your research. Read some manuals. Google is your friend. man is the best tool you will ever use.

These packages are also highly notable: vmstat , lsof , netstat , iptraf , monit , nethogs

There are other great ones like nmon , collectl , and monitorix ---

Hopefully these links will always work, but if they don't, I listed the notable packages each one mentions (RTFM):

http://kkovacs.eu/cool-but-obscure-unix-tools

dstat
sar
htop
atop
glances
slurm
iftop
iptraf
nethogs

http://www.tecmint.com/command-line-tools-to-monitor-linux-performance/

vmstat
lsof
tcpdump (ngrep)
netstat
htop
iotop
iostat
iptraf
psacct / acct
monit
nethogs
iftop
monitorix
arpwatch
suricata
vnstat
nagios
nmon
collectctl

http://www.binarytides.com/linux-commands-monitor-network/

nload
iftop
iptraf
nethogs
bmon
slurm
tcptrack
vnstat
bwm-ng
cbn
pkstat
netwatch
trafshow
netload
ifstat
dstat
collectl

Answer 2

Glances allows you to monitoring:

• Memory usage
• CPU usage
• Disk I/O
• Network I/O

and also:

• Load
• Processes (per process MEM, CPU, DIsk IO)
• Filesystem space
• Sensors

in a single CLI interface: