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I forgot the password I entered during postgres installation
...te the postgres user's password
alter user postgres with password 'secure-passwd-here';
Edit the file /etc/postgresql/<version>/main/pg_hba.conf and change trust back to md5 and save the file
Reload the postgresql service
$ sudo service postgresql reload
Verify that the password change is...
STL中map容器使用自定义key类型报错详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...定义该运算符或到预定义运算符可接收的类型的转换
定位错误
定位到第一个错误行的代码位置：f:\vs2008\vc\include\functional(143) :143行代码：
// TEMPLATE STRUCT less
emplate<class _Ty>
struct less
: public binary_function<_Ty, _Ty, bool>
{ // ...
How to pass the value of a variable to the stdin of a command?
...
(cat <<END
$passwd
END
) | command
The cat is not really needed, but it helps to structure the code better and allows you to use more commands in parentheses as input to your command.
...
How to run the sftp command with a password from Bash script?
... your file:
#!/bin/sh
HOST=<yourhostname>
USER=<someusername>
PASSWD=<yourpasswd>
cd <base directory for your put file>
lftp<<END_SCRIPT
open sftp://$HOST
user $USER $PASSWD
put local-file.name
bye
END_SCRIPT
And write/quit the vi editor after you edit the host, us...
What are the differences between the threading and multiprocessing modules?
...o run a huge number of processes or to create and destroy them frequently, etc. But the GIL weighs heavily on the balance toward processes, in a way that isn't true for, say, C or Java. So, you will find yourself using multiprocessing a lot more often in Python than you would in C or Java.
Meanwh...
Linux日志切分工具：Logrotate - 更多技术 - 清泛网 - 专注C/C++及内核技术
...似的还有Verbose选项，这里就不多说了。
Logrotate的疑问
问题：sharedscripts的作用是什么？
大家可能注意到了，我在前面Nginx的例子里声明日志文件的时候用了星号通配符，也就是说这里可能涉及多个日志文件，比如：access.log和e...
What does multicore assembly language look like?
...ng "load the EDX register with the value 5", "increment the EDX" register, etc.
10 Answers
...
How to check if a symlink exists
...n't exist"
fi
the result of above is like:
root@linux:~# ./sym.sh /etc/passwd
you entry is not symlink
root@linux:~# ./sym.sh /usr/mda
your entry is symlink
root@linux:~# ./sym.sh
=> File doesn't exist
share
...
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
|
show 3 more ...
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...