Oracle Linux/Common Tools
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Common Tools
Contents |
Listening Ports
netstat
~$ netstat -lnp Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 127.0.0.1:17003 0.0.0.0:* LISTEN - tcp 0 0 127.0.0.1:40333 0.0.0.0:* LISTEN - udp 42240 0 127.0.0.1:8125 0.0.0.0:* - udp 32256 0 169.254.0.2:53 0.0.0.0:* -
process activity
top
~$ top
LoadAvg Load average over 1, 5, and 15 minutes. divide by number of cores to determine load.
ps
ps -AlH
This shows all the processes running, in long format, with the extra full format output
Network Throughput
iperf
requires a server/client setup that communicates over port 5001. generally server/client placement is dependent on network accessibility, ie. server would be placed outside of the network, client within. You may need to open 5001 on both sides however, in case established/related is not implicitly accepted from the client side > out.
Server side
~$ sudo yum install -y iperf sudo iptables -A INPUT -p tcp --dport 5001 -j ACCEPT -m comment --comment "iperf - 5001" ~$ iperf -s
Example:
$ iperf -s ------------------------------------------------------------ Server listening on TCP port 5001 TCP window size: 85.3 KByte (default) ------------------------------------------------------------ [ 4] local 10.0.0.1 port 5001 connected with 10.0.0.2 port 47552 [ ID] Interval Transfer Bandwidth [ 4] 0.0-10.0 sec 76.6 MBytes 64.1 Mbits/sec [ 5] local 10.0.0.1 port 5001 connected with 10.0.0.2 port 39914 [ 5] 0.0-10.0 sec 84.5 MBytes 70.6 Mbits/sec
Client side
~$ iperf -c target.ip -p port.number
- Example
$ iperf -c 10.0.0.1 -p 5001 ------------------------------------------------------------ Client connecting to 10.0.0.1, TCP port 5001 TCP window size: 466 KByte (default) ------------------------------------------------------------ [ 3] local 10.0.0.1 port 39914 connected with 10.0.0.2 port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0-10.0 sec 84.5 MBytes 70.8 Mbits/sec
