查看Linux系统下CPU、内存、硬盘等信息

做个记录，方便日后查看使用。

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1. 查看CPU

1.1 查看CPU个数

[root@qy-ggyf-zyl-31 ~]# cat /proc/cpuinfo | grep "physical id" | uniq | wc -l
8

1.2 查看CPU详情

[root@qy-ggyf-zyl-31 ~]# cat /proc/cpuinfo
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 94
model name      : Intel Core Processor (Skylake)
stepping        : 3
microcode       : 0x1
cpu MHz         : 2194.842
cache size      : 4096 KB
physical id     : 0
siblings        : 1
core id         : 0
cpu cores       : 1
apicid          : 0
initial apicid  : 0
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss syscall nx pdpe1gb rdtscp lm constant_tsc rep_good nopl eagerfpu pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx avx512f rdseed adx smap clflushopt avx512cd xsaveopt xsavec xgetbv1 arat
bogomips        : 4389.68
clflush size    : 64
cache_alignment : 64
address sizes   : 46 bits physical, 48 bits virtual
power management:

1.3 查看CPU型号

[root@qy-ggyf-zyl-31 ~]# cat /proc/cpuinfo | grep 'model name' |uniq
model name      : Intel Core Processor (Skylake)

2. 查看内存

2.1 查看内存总数

[root@qy-ggyf-zyl-31 ~]# cat /proc/meminfo | grep MemTotal
MemTotal:       32775916 kB

2.2 查看内存详情

[root@qy-ggyf-zyl-31 ~]# cat /proc/meminfo
MemTotal:       32775916 kB
MemFree:        24031996 kB
MemAvailable:   29836020 kB
Buffers:          157888 kB
Cached:          7458304 kB
SwapCached:            0 kB
Active:          3515628 kB
Inactive:        4711068 kB
Active(anon):    1625168 kB
Inactive(anon):   575904 kB
Active(file):    1890460 kB
Inactive(file):  4135164 kB

3. 查看硬盘

3.1 查看硬盘大小

[root@cwcsb-gxcwy832-xnce-2 upload]# fdisk -l | grep Disk
Disk /dev/vda: 107.4 GB, 107374182400 bytes, 209715200 sectors
Disk label type: dos
Disk identifier: 0x000ba968
Disk /dev/vdb: 536.9 GB, 536870912000 bytes, 1048576000 sectors

3.2 查看硬盘使用情况

[root@cwcsb-gxcwy832-xnce-2 upload]# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/vda2       100G   49G   52G  49% /
devtmpfs         16G     0   16G   0% /dev
tmpfs            16G     0   16G   0% /dev/shm
tmpfs            16G   17M   16G   1% /run
tmpfs            16G     0   16G   0% /sys/fs/cgroup
/dev/vda1       485M  130M  356M  27% /boot
tmpfs           3.2G     0  3.2G   0% /run/user/1001

4. 查看文件夹

4.1 查看当前目录下文件和文件夹数

[root@cwcsb-gxcwy832-xnce-2 upload]# ls |wc -l
11

4.2 查看当前目录总大小

[root@cwcsb-gxcwy832-xnce-2 upload]# du -sh
3.1G    .

4.3 查看当前目录下各文件和文件夹大小

　　注：此举可以快速定位大文件所存在的位置。

[root@cwcsb-gxcwy832-xnce-2 upload]# du -sh *
1.2G    BOOT-INF
144K    exp_cwy_GX1009_1104.log
3.4M    HDTool
3.0M    HDTool.zip
144K    imp_cwy_GX1009_1028.log
84K     nohup.out
1.8G    olk
101M    promtail
4.0K    sendstartup.sh
36M     telegraf-1.21.4-1.x86_64.rpm
8.0K    update_aun.sh
[root@cwcsb-gxcwy832-xnce-2 upload]# ls
BOOT-INF                 HDTool      imp_cwy_GX1009_1028.log  olk       sendstartup.sh                update_aun.sh
exp_cwy_GX1009_1104.log  HDTool.zip  nohup.out                promtail  telegraf-1.21.4-1.x86_64.rpm

4.4 查看当前目录下各文件和文件夹（含下一级目录）大小

[root@cwcsb-gxcwy832-xnce-2 upload]# du -h --max-depth=1 *
1.2G    BOOT-INF/classes
19M     BOOT-INF/lib
1.2G    BOOT-INF
144K    exp_cwy_GX1009_1104.log
3.4M    HDTool
3.0M    HDTool.zip
144K    imp_cwy_GX1009_1028.log
84K     nohup.out
12K     olk/META-INF
420K    olk/org
1.2G    olk/BOOT-INF
1.8G    olk
101M    promtail
4.0K    sendstartup.sh
36M     telegraf-1.21.4-1.x86_64.rpm
8.0K    update_aun.sh

4.5 指定显示文件或文件夹大小

[root@cwcsb-gxcwy832-xnce-2 upload]# du -h --max-depth=0 /opt/cwy8.32
5.8G    /opt/cwy8.32
[root@cwcsb-gxcwy832-xnce-2 upload]# du -h --max-depth=1 /opt/cwy8.32
8.0K    /opt/cwy8.32/config
1.6G    /opt/cwy8.32/middleware
4.2G    /opt/cwy8.32/product
5.8G    /opt/cwy8.32
[root@cwcsb-gxcwy832-xnce-2 upload]# du -h --max-depth=1 BOOT-INF/
1.2G    BOOT-INF/classes
19M     BOOT-INF/lib
1.2G    BOOT-INF/
[root@cwcsb-gxcwy832-xnce-2 upload]# du -h --max-depth=1 exp_cwy_GX1009_1104.log
144K    exp_cwy_GX1009_1104.log

5. 查看Linux系统

5.1 查看Linux内核版本信息

[root@cwcsb-gxcwy832-xnce-2 upload]# uname -a
Linux cwcsb-gxcwy832-xnce-2 3.10.0-957.el7.x86_64 #1 SMP Thu Nov 8 23:39:32 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
[root@cwcsb-gxcwy832-xnce-2 upload]# cat /proc/version
Linux version 3.10.0-957.el7.x86_64 (mockbuild@kbuilder.bsys.centos.org) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-36) (GCC) ) #1 SMP Thu Nov 8 23:39:32 UTC 2018

5.2 查看Linux系统版本信息

[root@cwcsb-gxcwy832-xnce-2 upload]# cat /etc/redhat-release
CentOS Linux release 7.6.1810 (Core)
[root@cwcsb-gxcwy832-xnce-2 upload]# cat /etc/centos-release
CentOS Linux release 7.6.1810 (Core)