Linux System Monitoring basic commands
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Transcript of Linux System Monitoring basic commands
GNU/Linux Monitoring Tools
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Operating systems control our hardware and run our applications on
them, how can we monitor linux operating system?
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When we speak about monitoring it's the matter of all hardwares and users.
users
CPU
MemoryStorage
Ethernet
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The slides below will describe the very common command line basic
tools for monitoring.
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ps Command
The ps will provide you a list of processes
currently running. There is a wide variety of
options that thiscommand gives you.
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pstree Command
This command will give you a hierarchy of
current processes of the CPU regarding to their
parent process.
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top Command
The most common of Monitoring commands is top. The top will display a continually updating
report of systemresource usage.
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tcpdump Command
Tcpdump one of the 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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vmstat Command
The vmstat command will provide a report showing statistics for system processes, memory, swap, I/O, andthe CPU. These statistics are generated using data from
the last time the command was run to the present.
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iftop Command
iftop listens to network traffic on a named interface, or on the first interface it can find which looks like an external
interface if none is specified, and displays a table of current bandwidth usage by pairs of hosts.
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iostat Command
The iostat will display the current CPU load average and disk I/O information. This is a great command to monitor your disk I/O
usage.
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lsof Command
The lsof command will print out a list of every file that is in
use.
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du Command
To view usage by a directory or file you can
use du. Unless you specify a filename du
will act recursively.
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netstat Command
Netstat is a command line tool for monitoring incoming
and outgoing network packets statistics as well as interface statistics. It is very useful tool for every system
administrator to monitor network performance and
troubleshoot network related problems.
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df Command
The df is the simplest tool available to view disk usage. Simply type in df and you'll be shown disk usage for all
your mounted filesystems in 1K blocks
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iotop Command
iotop is also much similar to top command and Htop
program, but it has accounting function to
monitor and display real time Disk I/O and processes. This
tool is much useful for finding the exact process
and high used disk read/writes of the processes.
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who Command
The easiest way to see who is on the system is to
do a who or w.
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It is important that what is going on around us.
Finish
http://linux.org
http://gnu.org
http://xamin.ir
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● [1] http://tldp.org - The Linux System Administrator's Guide
● [2] http://www.tecmint.com/command-line-tools-to-monitor-linux-performance/
● [3] http://www.cyberciti.biz/tips/top-linux-monitoring-tools.html/top-output
References