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How to obtain the number of CPUs/cores in Linux from the command line?
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grep -c ^processor /proc/cpuinfo
will count the number of lines starting with "processor" in /proc/cpuinfo
For systems with hyper-threading, you can use
grep ^cpu\\scores /proc/cpuinfo | uniq | awk '{print $4}'
which should return (for e...
c/c++如何获取CPU的序列号？ - C/C++ - 清泛网 - 专注C/C++及内核技术
c/c++如何获取CPU的序列号？获取CPU序列表的完整实例代码如下：#include "stdafx.h"#include <afx.h>CString GetCpuSerial(){unsigned long st1 = 0;un...获取CPU序列表的完整实例代码如下：
#include "stdafx.h"
#include <afx.h>
CString GetCpuSerial()
{
unsigne...
Linux Glibc幽灵漏洞允许黑客远程获取系统权 - 操作系统(内核) - 清泛网 - ...
...数触发。幽灵漏洞是Linux glibc库上出现的一个严重的安全问题，通过该漏洞，攻击者可以在不了解系统的任何情况下远程获取Linux服务器的最高控制权限。glibc是Linux系统中最底层的API，几乎其它任何运行库都会依赖于glibc。glibc除...
Why is address zero used for the null pointer?
...; I use if (p != 0) all the time to make sure passed pointers are valid, etc.
21 Answers
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Add Keypair to existing EC2 instance
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[ubuntu@ip-11-111-111-111 ~]$ sudo su -
[root@ip-11-111-111-111 ubuntu]# passwd john
Add “john” to sudoer’s list by:
[root@ip-11-111-111-111 ubuntu]# visudo
.. and add the following to the end of the file:
john ALL = (ALL) ALL
Alright! We have our new user created, now you need ...
Mismatch Detected for 'RuntimeLibrary'
...sly the version of Visual C++, among other things like iterator debugging, etc.)
The most important part of the problem is this: having the same idea about the size of objects on either side of a function call.
Consider for example that the above two pieces of code are called A and B. A is compile...
How do I measure execution time of a command on the Windows command line?
... In case you want to use internal dos commands (eg.: dir, echo, del, etc.) don't forget to insert "cmd /c": Measure-Command { cmd /c dir /s c:\windows > nul }
– LietKynes
Jan 10 '12 at 10:49
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Is there an equivalent to CTRL+C in IPython Notebook in Firefox to break cells that are running?
...it useful. This python script will find any jupyter kernel using more than cpu_threshold CPU and prompts the user to send a SIGINT to the kernel (KeyboardInterrupt). It will keep sending SIGINT until the kernel's cpu usage goes below cpu_threshold. If there are multiple misbehaving kernels it will p...
Can linux cat command be used for writing text to file?
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I use the following code to write raw text to files, to update my CPU-settings. Hope this helps out!
Script:
#!/bin/sh
cat > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor <<EOF
performance
EOF
cat > /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor <<EOF
pe...
How many threads can a Java VM support?
...do other normal operations like browsing, opening, closing other programs, etc.
With 25,000 threads system slows down but it remains responsive.
With 50,000 threads system stopped responding instantly and I had to restart my system manually.
My system details are as follows :
Processor : Intel c...