Linux System Resource View

The following Linux system resources view commands, more commonly used for Vmstat and lsof

• Vmstat [Refresh delay Refresh Count]

1[Email protected]606: ~$ Vmstat1 52procs-----------Memory-------------Swap-------io-----system--------CPU-----3R b swap free buffer cache si so bi boinchCS US SyIDWA St4  0  0      0 4721680 294340 1586676    0    0     -     -  441  738  4  2 94  1  05  0  0      0 4721556 294348 1586676    0    0     0   280 1391 2388  2  0  the  1  06  0  0      0 4721416 294364 1586676    0    0     0   104 1410 2443  2  1  the  1  07  2  0      0 4721416 294364 1586716    0    0     0     0 2149 3443  2  1  the  0  08  0  0      0 4721416 294364 1586716    0    0     0     0 1430 2393  2  0  the  0  09[Email protected]606:~$

• DMESG Kernel self-test information

1[Email protected]606: ~$ DMESG |grepCPU2[0.000000] Smpboot:allowing6CPUs,0HotPlug CPUs3[0.000000] Setup_percpu:nr_cpus: theNr_cpumask_bits: theNr_cpu_ids:6Nr_node_ids:14[0.000000] Slub:hwalign= -, order=0-3, minobjects=0, cpus=6, nodes=15[0.000000] RCU restricting CPUs from nr_cpus= theTo nr_cpu_ids=6.6[0.006228] Cpu:physical Processor ID:07[0.006228] Cpu:processor Core ID:08[0.006229] MCE:CPU Supports7MCE Banks9[0.167668] Smpboot:CPU0:AMD FX (tm)-6300Six-core Processor (family:0x15, Model:0x2, Stepping:0x0)Ten[0.168386] NMI watchdog:enabled on all CPUs, permanently consumes one hw-PMU counter. One[0.168474] .... Node #0, CPUs: #1#2#3#4#5 A[0.182597] x86:booted up1Node6CPUs -[1.579348] ledtrig-cpu:registered to indicate activity on CPUs -[1.580211] Microcode:cpu0:patch_level=0x0600081f the[1.580215] Microcode:cpu1:patch_level=0x0600081f -[1.580222] Microcode:cpu2:patch_level=0x0600081f -[1.580228] Microcode:cpu3:patch_level=0x0600081f -[1.580236] Microcode:cpu4:patch_level=0x0600081f +[1.580244] Microcode:cpu5:patch_level=0x0600081f -[Email protected]606:~$

• Free View Memory
• Cat/proc/cpuinfo Viewing CPU information
• Uptime viewing system boot time and average load
• uname [option]

Options

-A view all relevant information about the system

-R View Kernel version

-S View kernel name

1[Email protected]606:~$uname-a2Linux ucm-aspire-tc-606 4.8.0- --generic # --ubuntu SMP Fri Nov One  -:Geneva: theUtc .x86_64 x86_64 x86_64 gnu/Linux3[Email protected]606:~$uname-R4 4.8.0- --Generic5[Email protected]606:~$uname-s6 Linux7[Email protected]606:~$

• Determine the number of system bits

The file external command shows how many bits of the command are commands and then knows the number of system bits.

1 [email protected]606file /bin/ls2 /bin/ls-bit LSB executable, x86-1 (SYSV), dynamically linked, interpreter/lib64/ld-linux-x86-  . So. 2  for 2.6. buildid[sha1]=eca98eeadafddff44caf37ae3d4b227132861218, stripped3 [email Protected]606

• System Release version

1 [email protected]606: ~$ lsb_release-a2No LSB modules is available. 3 Distributor ID:    Ubuntu4 Description:    16.105 Release:    16.106 codename:    yakkety7 [email protected]606

• List file information that is open or used by the system

lsof [option]

Options

-C string lists only files opened with a process beginning with a string

-u user name lists only files opened by a user's process

-p PID lists files opened by a PID process

eg

Querying files for all process calls in the system

[Email protected]:~$ lsof | More

Query which process is called by a system file

[Email protected]:~$ lsof/sbin/initcommand  PID USER  FD   TYPE DEVICE size/off     NODE namesystemd 1280  UCM txt    REG    8,1  

See which files are called by the httpd process

[Email protected]:~$ lsof-c httpd

Query the file name of a user's process call according to the user name

[Email protected]:~$ lsof-u Root

　　

Linux System Resource View