Linux小技巧
2019-05-27
Linux
查看CPU信息
more /proc/cpuinfo # 查看cpu信息
lscpu # 查看cpu信息
cat /proc/cpuinfo | grep name | cut -f2 -d: | uniq -c # 查看cpu型號和邏輯核心數
getconf LONG_BIT # cpu運行的位數
cat /proc/cpuinfo | grep 'physical id' |sort| uniq -c # 物理cpu個數
cat /proc/cpuinfo | grep flags | grep ' lm ' | wc -l # 結果大於0支持64位
cat /proc/cpuinfo|grep flags # 查看cpu是否支持虛擬化 pae支持半虛擬化 IntelVT 支持全虛擬化python：
快速統計可迭代對象元素個數排名
# collections.Counter lets you find the most common
# elements in an iterable:
>>> import collections
>>> c = collections.Counter('helloworld')
>>> c
Counter({'l': 3, 'o': 2, 'e': 1, 'd': 1, 'h': 1, 'r': 1, 'w': 1})
>>> c.most_common(3)
[('l', 3), ('o', 2), ('e', 1)]2019-05-28
Linux
查看系統硬件信息
more /proc/meminfo # 查看內存信息
dmidecode # 查看全面硬件信息
dmidecode | grep "Product Name" # 查看服務器型號
dmidecode | grep -P -A5 "Memory\s+Device" | grep Size | grep -v Range # 查看內存插槽
cat /proc/mdstat # 查看軟raid信息
cat /proc/scsi/scsi # 查看Dell硬raid信息(IBM、HP需要官方檢測工具)
lspci # 查看硬件信息python：
運用python切片技巧
# You can clear all elements from a list:
>>> lst = [1, 2, 3, 4, 5]
>>> del lst[:]
>>> lst
[]
# You can replace all elements of a list
# without creating a new list object:
>>> a = lst
>>> lst[:] = [7, 8, 9]
>>> lst
[7, 8, 9]
>>> a
[7, 8, 9]
>>> a is lst
True
# You can also create a (shallow) copy of a list:
>>> b = lst[:]
>>> b
[7, 8, 9]
>>> b is lst
False更多歷史小技巧，技術交流，崗位內推訪問【馬哥社區 club.magedu.com】