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原子vector的一种实现源码(atomic-vector) - C/C++ - 清泛网 - 专注C/C++及内核技术
...行的版本，代码比较简单，实现分配好空间，然后对元素进行原子交换，扩容采用链表的形式，代码可直接运行。
测试代码：
HPHP::AtomicVector<float> v_atom(2, 0.f);
void atom_vector_hphp() {
v_atom.exchange(0, 1);
v_atom.exchange(1, 2);
}
atom...
Can't su to user jenkins after installing Jenkins
...
as root, enter su - jenkins
Also, check in /etc/passwd that user jenkins is allowed to logon: there should be something like /bin/bash or /bin/sh, certainly not /bin/false at the end of the line.
Hint: You don't use su and sudo at the same time.
...
记一次MongoDB性能问题 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...c/<PID>/fd/<FD>
此时如果查询MongoDB的当前操作，会发现几乎每个操作会消耗大量的时间：
mongo> db.currentOp()
与此同时，运行mongostat的话，结果会显示很高的locked值。
…
我在网络上找到一篇：MongoDB Pre-Splitting for Faster Data Loading a...
Linux下追踪程序退出(崩溃)思路 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...把缓存中的历史命令写入历史命令保存文件~/.bash_history，每个用户文件下都有一个历史命令的保存文件，相互之间不会冲突。直接用history看到的历史命令是要比.bash_history文件中的历史命令多一些的，因为我们登录之后新操作的...
如何获取IE (控件)的所有链接（包括Frameset, iframe） - 其他 - 清泛IT社...
... {
// 对 _framedoc 节点进行处理
}
}复制代码iframe 跨域访问(cross frame) zz from : http://codecentrix.blogspot.com/ ... cument-returns.html
由于安全性限制, 为防止跨域脚本攻击, 当fra...
How does password salt help against a rainbow table attack?
...ee what purpose the salt serves,
A rainbow table attack always needs /etc/passwd (or whatever password database is used), or else how would you compare the hashes in the rainbow table to the hashes of the actual passwords?
As for the purpose: let's say the attacker wants to build a rainbow table fo...
Read user input inside a loop
...
read input
echo $input;
done
Unit test:
for line in $(cat /etc/passwd); do
read input
echo $input;
echo "[$line]"
done
share
|
improve this answer
|
...
Allow user to set up an SSH tunnel, but nothing else
... may be tunneling, without an interactive shell, to set that shell in /etc/passwd to /usr/bin/tunnel_shell.
Just create the executable file /usr/bin/tunnel_shell with an infinite loop.
#!/bin/bash
trap '' 2 20 24
clear
echo -e "\r\n\033[32mSSH tunnel started, shell disabled by the system administr...
Alarm 闹钟扩展 · App Inventor 2 中文网
... offsetY = e.clientY - element.offsetTop; return false; // 防止文本选中 }; // 鼠标移动时拖动元素 document.onmousemove = function(e) { if (!isDragging) return; element.style.left = (e.clientX - offsetX) + 'px'; element.style.top = (e....
FTP/SFTP access to an Amazon S3 Bucket [closed]
...our security credentials in a form access-key-id:secret-access-key to /etc/passwd-s3fs
Add a bucket mounting entry to fstab:
<bucket> /mnt/<bucket> fuse.s3fs rw,nosuid,nodev,allow_other 0 0
For details, see my guide Setting up an SFTP access to Amazon S3.
Use S3 Client
Or use any...