Some useful commands...

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Some useful commands...

Postby Nimy » Wed Oct 29, 2014 3:01 pm

top---Command for performance monitoring. It display CPU usage, Memory usage, Swap Memory, Cache Size, Buffer Size, Process PID etc..
htop---Much advanced interactive and real time Linux process monitoring tool.
iotop---Much similar to top command and Htop program, but it has accounting function to monitor and display real time Disk I/O and processes. Useful for finding the exact process and high used disk read/writes of the processes.
vmstat---Command to display statistics of virtual memory, kernerl threads, disks, system processes, I/O blocks, interrupts, CPU activity etc..
netstat---Command line tool for monitoring incoming and outgoing network packets statistics as well as interface statistics.
iostat---Command line tool that will collect and show system input and output storage device statistics. Used to trace storage device performance issues including devices, local disks, remote disks such as NFS.
lsof---Command to display list of all the open files and the processes.
tcpdump---Most widely used command-line network packet analyzer or packets sniffer program that is used capture or filter TCP/IP packets that received or transferred on a specific interface over a network.
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Re: Some useful commands...

Postby SIbinPhilip » Sat Jan 17, 2015 10:26 am

Some additional monitoring tools.

Nload --> monitor the incoming and outgoing traffic separately
iftop --> measures the data flowing through individual socket connections,
tcptrack --> Tcptrack is similar to iftop. It also measures the data flowing through individual socket connections.
iptraf --> shows individual connections and the amount of data flowing between the hosts
Vnstat --> it is a bit different from most of the other tools. It actually runs a background service/daemon and keeps recording the size of data transfer all the time.
ss -l --> for socket statistics
nethogs --> shows the bandwidth used by individual processes
psacct --> for monitoring each users activity on the system
# ac --> displays total statistics of connect time in hours based on the user logins/logouts from the current wtmp file.
# ac -d --> prints out the total login time in hours by day-wise
# ac -p --> print the total login time of each user in hours.
# sa --> print the summary of commands that were executed by users

Some of these tools might not be present as default, you may have to install the packages separately.

Hope this might be useful.
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Joined: Tue Nov 25, 2014 12:01 pm

Some useful commands

Postby Jamesvubre » Sun May 14, 2017 5:07 pm


I am new to AIX. Actually, I have been moved to a different project wherein I have to work on AIX server.

I searched online for some beginners guide but didnt find any useful start-up guide.

Could you please explain some frequently used commands from the point of administration of AIX?

I found that top command is not there. We use topas on AIX. I have also seen screen command.

Please suggest some AIX commands to get familiar with AIX.


Ich habe hier mein Sofa im Test online gefunden.

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Joined: Sat May 06, 2017 11:50 am
Location: Kenya

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