嵌入式开发必备-RK3562演示Linux常用系统查询命令(上)

本文介绍Linux系统查看硬件配置及常用调试命令，方便开发者快速了解开发板硬件信息及进行相关调试。触觉智能RK3562开发板演示。

查看DDR

• 获取内存信息

下面数字以MB为单位。

root@ido:/# free -m
              total        used        free      shared  buff/cache   available
Mem:           1970         287        1316          19         366        1638
Swap:             0           0           0

• 更详细信息可以使用下面命令查看

root@ido:/# cat /proc/meminfo
MemTotal:        2017532 kB #总内存的大小
MemFree:         1347508 kB #系统当前可用的空闲内存大小
MemAvailable:    1677712 kB #系统当前可用的内存大小，这包括空闲内存和缓存的内存。
Buffers:           32500 kB
Cached:           309484 kB
SwapCached:            0 kB
Active:           108648 kB
Inactive:         433624 kB
Active(anon):       1080 kB
Inactive(anon):   219252 kB
Active(file):     107568 kB
Inactive(file):   214372 kB
Unevictable:        8132 kB
Mlocked:               0 kB
SwapTotal:             0 kB
SwapFree:              0 kB
Dirty:                 0 kB
Writeback:             0 kB
AnonPages:        208420 kB
Mapped:           189896 kB
Shmem:             20044 kB
KReclaimable:      33300 kB
Slab:              74908 kB
SReclaimable:      33300 kB
SUnreclaim:        41608 kB
KernelStack:        5328 kB
PageTables:         7736 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:     1008764 kB
Committed_AS:    1675032 kB
VmallocTotal:   263061440 kB
VmallocUsed:       11944 kB
VmallocChunk:          0 kB
Percpu:              720 kB
CmaTotal:          16384 kB
CmaAllocated:       1600 kB
CmaReleased:       14784 kB
CmaFree:            2088 kB查看DDR频率

下面数字以hz为单位。

root@ido:/# free -m
              total        used        free      shared  buff/cache   available
Mem:           1970         287        1316          19         366        1638
Swap:             0           0           0

查看存储

• 查看物理存储空间

root@ido:~# lsblk
NAME         MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
mmcblk2      179:0    0 14.6G  0 disk 
├─mmcblk2p1  179:1    0    4M  0 part 
├─mmcblk2p2  179:2    0    4M  0 part 
├─mmcblk2p3  179:3    0   64M  0 part 
├─mmcblk2p4  179:4    0  128M  0 part 
├─mmcblk2p5  179:5    0   32M  0 part 
├─mmcblk2p6  179:6    0    2G  0 part /media/ido/userdata
├─mmcblk2p7  179:7    0  128M  0 part /media/ido/oem
└─mmcblk2p8  179:8    0 12.2G  0 part /
mmcblk2boot0 179:32   0    4M  1 disk 
mmcblk2boot1 179:64   0    4M  1 disk 

• 查看文件系统空间

root@ido:/# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/root        12G  3.5G  8.0G  31% /
devtmpfs        974M  8.0K  974M   1% /dev
tmpfs           985M     0  985M   0% /dev/shm
tmpfs           197M  7.6M  190M   4% /run
tmpfs           5.0M  4.0K  5.0M   1% /run/lock
tmpfs           985M     0  985M   0% /sys/fs/cgroup
tmpfs           197M     0  197M   0% /run/user/0
tmpfs           197M  8.0K  197M   1% /run/user/1001
/dev/mmcblk2p7  121M   12M  101M  11% /media/ido/oem
/dev/mmcblk2p6  2.0G   36K  1.8G   1% /media/ido/userdata

查看CPU

• 查看CPU频率

下面数字以kHz为单位。

root@ido:/# cat /sys/devices/system/cpu/cpu*/cpufreq/cpuinfo_cur_freq
408000
408000
408000
408000

• 查看CPU温度

下面数字以毫摄氏度为单位，需要除以1000即35摄氏度。

root@ido:/# cat /sys/class/thermal/thermal_zone0/temp
34375

查看网络信息

• 查看网络节点及IP

root@ido:~# ifconfig
enp1s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.0.96  netmask 255.255.255.0  broadcast 192.168.0.255
        inet6 fe80::a60a:bffe:32d2:8a02  prefixlen 64  scopeid 0x20<link>
        ether 9a:55:02:97:d9:a2  txqueuelen 1000  (Ethernet)
        RX packets 121  bytes 12817 (12.8 KB)
        RX errors 0  dropped 2  overruns 0  frame 0
        TX packets 31  bytes 5749 (5.7 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device interrupt 90  base 0xd000  


eth0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether 8a:18:a3:a0:63:c9  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device interrupt 71  


eth2: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether 8e:18:a3:a0:63:c9  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device interrupt 75  


lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 192  bytes 14785 (14.7 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 192  bytes 14785 (14.7 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0


wlan0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether c0:f5:35:12:5a:40  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

• 查看网关

root@ido:~# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         192.168.0.1     0.0.0.0         UG    100    0        0 enp1s0
192.168.0.0     0.0.0.0         255.255.255.0   U     100    0        0 enp1s0

更多Linux常用系统查询命令，请关注下集。

产品简介

触觉智能RK3562开发板（型号EVB3562），基于瑞芯微新一代Soc RK3562/RK3562J设计，可用于轻量级人工智能应用。EVB3562开发板配备了PCIe2.1/USB3.0 OTG/千兆网口等各类型接口，支持4G/5G通信、多摄像头及多种视频接口，可应用于物联网网关、平板电脑、智能家居、教育电子、工业显示、工业控制等行业领域。