Linux System Analysis Command summary

1, Top: real-time display of the process in the system resource consumption status

2. Iostat: Displays the IO load status of the system device. -X common options for displaying and IO-related extended data

3, netstat: Display various network related information, such as network connection, routing table, interface status (Interface Statistics), masquerade connection, multicast member (multicast memberships), etc.

4, SAR: Display system activities, including: Read and write the file, the use of system calls, disk I/O,CPU efficiency, memory usage, process activities and IPC-related activities, etc.

5, the use of OPROFILE:CPU status.

Initialization

• Opcontrol--no-vmlinux : Indicates that the kernel module, kernel code-related statistics are not recorded after oprofile boot detection
• opcontrol--init : Load oprofile module, oprofile driver

Detection control

• Opcontrol--start : Indicates oprofile start detection
• Opcontrol--dump : Indicates that Oprofile detected data is written to the file
• Opcontrol--reset : Clears previously detected data records
• opcontrol-h : Close the oprofile process

View Test Results

• opreport : Display detection results in image view, process, dynamic library, kernel module belong to mirror category
• opreport-l : Displaying the test results at a functional angle
• opreport-l Test : Displays the test results for the test process at the point of view of the function
• opannotate-s Test : Displays the test results for the test process in Code view
• opannotate-s/lib64/libc-2.4.so : Display test results for libc-2.4.so Library in Code view

6, PS: System Current process status

7. Free: Monitor system memory

8. Cat/proc/meminfo View System memory usage

9. Du: View file consumption disk status

10. DF: System disk space status

Linux System Analysis Command summary