文件系统 Proc

proc 文件系统

虚拟文件系统： 内核、进程运行的状态信息
[root@localhost ~]# du -sh /proc
0 /proc

/proc/cpuinfo
[root@localhost ~]# grep 'processor' /proc/cpuinfo //逻辑cpu的个数
processor : 0
processor : 1
[root@localhost ~]# grep 'physical id' /proc/cpuinfo //物理cpu的个数
physical id : 0
physical id : 0
==flags
lm（64位）
vmx 支持虚拟化 Intel
svm 支持虚拟化 AMD
[root@localhost ~]# egrep --color 'lm|vmx|svm' /proc/cpuinfo
flags : fpu vme de clflush dts acpi lm constant_tsc pni monitor ds_cplvmx est tm2 ssse3 cx16 xtpr lahf_lm
flags : fpu vme de clflush dts acpi lm constant_tsc pni monitor ds_cplvmx est tm2 ssse3 cx16 xtpr lahf_lm

[root@localhost ~]# lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
CPU(s): 4
On-line CPU(s) list: 0-3
Thread(s) per core: 2
Core(s) per socket: 2
Socket(s): 1
Virtualization: VT-x
L1d cache: 32K
L1i cache: 32K
L2 cache: 256K
L3 cache: 3072K
NUMA node0 CPU(s): 0-3

/proc/meminfo
[root@localhost ~]# less /proc/meminfo
[root@localhost ~]# free -m
total used free shared buffers cached
Mem: 2017 1955 61 0 113 1426
-/+ buffers/cache: 416 1600
Swap: 8001 0 8001

/proc/cmdline //内核启动参数
[root@localhost ~]# cat /proc/cmdline
ro root=/dev/mapper/GLSvg-GLSroot rd_NO_LUKS LANG=en_US.UTF-8 rd_LVM_LV=GLSvg/GLSroot rd_LVM_LV=GLSvg/GLSswap rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=129M@0M KEYBOARDTYPE=pc KEYTABLE=us biosdevname=0 rd_NO_DM rhgb quiet

uptime
[root@localhost ~]# uptime

17:20:58 up 8:33, 3 users, load average: 0.43, 0.36, 0.36