逻辑上,所有的目录都在最高级别目录“/”下,根目录是所有目录的起点。所有的磁盘必须通过挂载目录实现访问。
默认的系统挂载配置在/etc/fstab中
[root@CentOS6 ~]# cat /etc/fstab
#
# /etc/fstab
# Created by anaconda on Tue Aug 7 00:56:30 2018
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
UUID=26cbb6ee-f235-4fcc-a191-c8a02b76519b / ext4 defaults 1 1
UUID=a8a194ae-ad0f-4163-bd0b-838b02738ebf /boot ext4 defaults 1 2
UUID=9733b004-d6cb-4909-83eb-8902ffcb7533 swap swap defaults 0 0
tmpfs /dev/shm tmpfs defaults 0 0
devpts /dev/pts devpts gid=5,mode=620 0 0
sysfs /sys sysfs defaults 0 0
proc /proc proc defaults 0 0
[root@CentOS6 ~]#
根目录下的结构
[root@CentOS6 /]# tree -L 1 /
/
├── bin
├── boot
├── dev
├── etc
├── home
├── lib
├── lib64
├── lost+found
├── media
├── mnt
├── opt
├── proc
├── root
├── sbin
├── selinux
├── server
├── srv
├── sys
├── tmp
├── usr
└── var
21 directories, 0 files
在/proc目录下,有几个比较重要的文件
查看内存使用情况
[root@CentOS6 /]# cat /proc/meminfo
MemTotal: 2049924 kB
MemFree: 1687728 kB
Buffers: 38556 kB
Cached: 196964 kB
SwapCached: 0 kB
Active: 118520 kB
Inactive: 128332 kB
Active(anon): 11344 kB
Inactive(anon): 224 kB
Active(file): 107176 kB
Inactive(file): 128108 kB
Unevictable: 0 kB
Mlocked: 0 kB
SwapTotal: 524284 kB
SwapFree: 524284 kB
Dirty: 0 kB
Writeback: 0 kB
AnonPages: 11348 kB
Mapped: 6428 kB
Shmem: 240 kB
Slab: 68808 kB
SReclaimable: 45880 kB
SUnreclaim: 22928 kB
KernelStack: 1312 kB
PageTables: 2512 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 1549244 kB
Committed_AS: 57568 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 171584 kB
VmallocChunk: 34359551096 kB
HardwareCorrupted: 0 kB
AnonHugePages: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 10240 kB
DirectMap2M: 2086912 kB
也可以
[root@CentOS6 /]# free -m
total used free shared buffers cached
Mem: 2001 353 1648 0 37 192
-/+ buffers/cache: 123 1878
Swap: 511 0 511
[root@CentOS6 /]#
查看cup
[root@CentOS6 /]# cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 142
model name : Intel(R) Core(TM) i7-7500U CPU @ 2.70GHz
stepping : 9
microcode : 132
cpu MHz : 2903.994
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 : 22
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss syscall nx rdtscp lm constant_tsc up arch_perfmon pebs bts xtopology tsc_reliable nonstop_tsc aperfmperf unfair_spinlock eagerfpu pni pclmulqdq ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx hypervisor lahf_lm 3dnowprefetch ida arat epb xsaveopt pln pts dtherm hwp hwp_noitfy hwp_act_window hwp_epp pti retpoline
bogomips : 5807.98
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:
查看系统负载
[root@CentOS6 /]# cat /proc/loadavg
0.00 0.00 0.00 1/83 1908