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Getting error: Peer authentication failed for user “postgres”, when trying to get pgsql working with
...
need to use same passwords? sudo passwd postgres
– Peter Krauss
Aug 27 '17 at 15:52
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MySQL主从服务器数据一致性的核对与修复 - 数据库(内核) - 清泛网 - 专注C/...
...性的核对与修复我上一次遇到MySQL主从服务器数据一致性问题，想想是几年前的事情了，还依稀记得当时惊慌失措的情景，好在最后借助Maatkit解决了问题。几年...我上一次遇到MySQL主从服务器数据一致性问题，想想是几年前的事...
What does the number in parentheses shown after Unix command names in manpages mean?
...es (usually found in /dev)
5 File formats and conventions eg /etc/passwd
6 Games
7 Miscellaneous (including macro packages and conven‐
tions), e.g. man(7), groff(7)
8 System administration commands (usually only for root)
9 Kernel routin...
Number of processors/cores in command line
...
The most simplest tool comes with glibc and is called getconf:
$ getconf _NPROCESSORS_ONLN
4
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Postgresql: password authentication failed for user “postgres”
...s.
If you do not have a password for the User postgres ubuntu do:
$ sudo passwd postgres
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PostgreSQL: How to change PostgreSQL user password?
... To change the password on the postgres user in Linux: sudo passwd postgres
– Punnerud
Aug 28 '19 at 6:31
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Regexp Java for password validation
...wordvalidation {
public static void main(String[] args) {
String passwd = "aaZZa44@";
String pattern = "(?=.*[0-9])(?=.*[a-z])(?=.*[A-Z])(?=.*[@#$%^&+=])(?=\\S+$).{8,}";
System.out.println(passwd.matches(pattern));
}
}
Explanations:
(?=.*[0-9]) a digit must occur at...
BLE协议—广播和扫描 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...用扫描和广播进行数据的传输（数据量不大，功耗要求较高的情况下），也可以在广播和扫描的基础上进行连接后点对点通信。
BLE协议—广播和扫描
版权声明：本文为博主原创文章，遵循 CC 4.0 BY-SA 版权协议，转载...
How to configure Git post commit hook
...
I saw two possible solutions:
1: Changing my hook to:
curl --user name:passwd -s http://domain?token=whatevertokenuhave
2: setting project based authorization.
The former solutions has the disadvantage that I had to expose my passwd in the hook file. Unacceptable in my case.
The second works...
Asynchronous vs Multithreading - Is there a difference?
... to other work while the I/O hardware (disk controller, network interface, etc.) does the I/O work. The hardware lets the CPU know when it's finished by interrupting the CPU, and the OS then delivers the event to your application.
Frequently higher-level abstractions and APIs don't expose the unde...