linux之查看系统基本信息

1. 查看内核版本

> uname -a

# 输出: 
Linux iZ252041roxZ 3.13.0-65-generic #106-Ubuntu SMP Fri Oct 2 22:08:27 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

2. 查看CPU信息（Mac不通用）

> cat /proc/cpuinfo

# 输出：
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 45
model name	: Intel(R) Xeon(R) CPU E5-2630 0 @ 2.30GHz
stepping	: 7
microcode	: 0x710
cpu MHz		: 2300.054
cache size	: 15360 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 clflush mmx fxsr sse sse2 ht syscall nx rdtscp lm constant_tsc rep_good nopl pni ssse3 cx16 sse4_1 sse4_2 popcnt aes hypervisor lahf_lm
bogomips	: 4600.10
clflush size	: 64
cache_alignment	: 64
address sizes	: 46 bits physical, 48 bits virtual
power management:

3. 查看内存信息（Mac不通用）

> cat /proc/meminfo

# 输出：
MemTotal:        2048524 kB
MemFree:          220840 kB
Buffers:          270808 kB
Cached:           900096 kB
SwapCached:            0 kB
Active:          1039804 kB
Inactive:         364380 kB
Active(anon):     233420 kB
Inactive(anon):     5812 kB
Active(file):     806384 kB
Inactive(file):   358568 kB
Unevictable:           0 kB
Mlocked:               0 kB
SwapTotal:             0 kB
SwapFree:              0 kB
Dirty:                76 kB
Writeback:             0 kB
AnonPages:        233328 kB
Mapped:            42616 kB
Shmem:              5952 kB
Slab:             386996 kB
SReclaimable:     367920 kB
SUnreclaim:        19076 kB
KernelStack:        1608 kB
PageTables:        10580 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:     1024260 kB
Committed_AS:     797248 kB
VmallocTotal:   34359738367 kB
VmallocUsed:       10840 kB
VmallocChunk:   34359720188 kB
HardwareCorrupted:     0 kB
AnonHugePages:     88064 kB
HugePages_Total:       0
HugePages_Free:        0
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:       2048 kB
DirectMap4k:       55296 kB
DirectMap2M:     2172928 kB

4. 查看磁盘信息

> df -lm

# 输出：
Filesystem     1M-blocks  Used Available Use% Mounted on
/dev/vda1          20029 13395      5595  71% /
none                   1     0         1   0% /sys/fs/cgroup
udev                 487     1       487   1% /dev
tmpfs                100     1       100   1% /run
none                   5     0         5   0% /run/lock
none                 497     0       497   0% /run/shm
none                 100     0       100   0% /run/user

5. 查看一个文件夹的大小

> du -sh    #查看当前文件夹大小
> du -sh ~  #查看任意文件夹大小