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What is a “thread” (really)?
... the Instruction Pointer. For most instructions, this simply advances the IP by the size of the instruction, but control flow instructions change the IP in other, predictable ways. The sequence of values the IP takes on forms a path of execution weaving through the program code, giving rise to the...
How to execute mongo commands through shell scripts?
I want to execute mongo commands in shell script, e.g. in a script test.sh :
22 Answers
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Trying to SSH into an Amazon Ec2 instance - permission error
...
This command + ssh -i YOUR_PEM_FILE.pem ec2-user@YOUR_IP fixed the issue. Maybe this should be the accepted answer...
– c4k
Apr 24 '14 at 18:07
add a comm...
Datatables - Search Box outside datatable
...
Default with search input in its own div:
sDom: '<"search-box"r>lftip'
If you use jQuery UI (bjQueryUI set to true):
sDom: '<"search-box"r><"H"lf>t<"F"ip>'
The above will put the search/filtering input element into it's own div with a class named search-box that is out...
Access denied for user 'test'@'localhost' (using password: YES) except root user
...ger exists.
My problem showed up when we changed the wildcard host (%) to IP specific, making the database more secure. Unfortunately there are some views that are still using 'user'@'%' even though 'user'@'172....' is technically correct.
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正则表达式 30 分钟入门教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...试正则表达式
其它可用的测试工具:
RegexBuddy
Javascript正则表达式在线测试工具
如果你不觉得正则表达式很难读写的话，要么你是一个天才，要么，你不是地球人。正则表达式的语法很令人头疼，即使对经常使用它的人...
Postfix发信的频率控制几个参数 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...会被浪费，更严重这会被认为是网络攻击而导致服务器或IP被封。因此需要通过一些参数配置解决，重试一定次数后仍失败的就放弃发送。postfix发信的频率控制有几个:
smtpd_client_connection_rate_limit=5
ip地址连接的频率控制.
smtpd_cl...
How can I generate a self-signed certificate with SubjectAltName using OpenSSL? [closed]
...sage to the following under [ v3_ca ]:
keyUsage = digitalSignature, keyEncipherment
digitalSignature and keyEncipherment are standard fare for a server certificate. Don't worry about nonRepudiation. It's a useless bit thought up by computer science guys/gals who wanted to be lawyers. It means not...
How can I start an interactive console for Perl?
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I wrote a script I call "psh":
#! /usr/bin/perl
while (<>) {
chomp;
my $result = eval;
print "$_ = $result\n";
}
Whatever you type in, it evaluates in Perl:
> gmtime(2**30)
gmtime(2**30) = Sat Jan 10 13:37:04 2004
>...
Force unmount of NFS-mounted directory [closed]
...ing (including lsof). I caused the problem by breaking out of a backup script that I'm writing. The script mounts and unmounts the directory, but something about breaking out of rsync messed up my mount. I didn't know about the lazy unmount. It may have been the NAS device causing all the troubl...