Linux Programming Learning: Linux operations must-have system tools

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1, acct or PSACCT

Acct also called PSACCT (depending on whether you use Apt-get or yum) to monitor all user-executed commands, including CPU time and memory consumption. Once the installation is complete, you can use the command SA to view the statistics.

2, Whowatch

Like acct, this tool monitors all the users on the system and allows you to see in real time the commands they are executing and the processes they are running. It outputs all the processes in a tree-like structure so you can see exactly what's going on.

3, Strace

Strace is used to diagnose, debug, and monitor the process of mutual invocation between programs. The most common practice is to use the Strace printing system to invoke the list of programs, which can see whether the program is executed as expected.

4. DTrace

DTrace can be said to be Strace's eldest brother. It dynamically tracks instructions that run in real time with the instrumented code. It allows you to drill down into its performance and diagnose faults. However, it is not simple, there are more than 1200 books on this topic.

5, Webmin

Webmin is a WEB-based system management tool. It does not require manual editing of UNIX configuration files, allowing you to manage your system remotely. It has a pair of monitoring modules for connecting it.

6. Stat

Stat is a built-in tool for displaying status information for files and file systems. It shows when the file was modified, accessed, or changed.

7, Ifconfig

Ifconfig is a built-in tool for configuring network interfaces. Most network monitoring tools use Ifconfig to set the network card into chaotic mode to capture all packets. You can manually perform ifconfig eth0 Promisc into chaos mode, using Ifconfig Eth0-promisc to return to normal mode.

8, Ulimit

Ulimit is a built-in tool that monitors system resources and can limit any monitoring resources to be exceeded. For example, to do a forkxxx, if the use of ULIMIT properly configured will be completely unaffected.

9, CPULimit

CPULimit is a small tool used to monitor and limit the CPU usage of the process. It can be used to keep the CPU usage of the batch job in a certain range.

10, LSHW

LSHW is a small built-in tool that can extract detailed information about the native hardware configuration. It can output the CPU version and motherboard configuration. W is a built-in command to display information about the currently logged-on user and the processes they are running.

11, Lsof

Lsof is a built-in tool that allows you to list all open files and network connections. From there you can see which process the file was opened on, based on the process name to find its specific user, or to kill all processes belonging to a user.

Linux Programming Learning: Linux operations must-have system tools