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驯服Linux OOM Killer（优质英文资料翻译） - 操作系统(内核) - 清泛网 - ...
...要操作。在这样的情况下，
用户和系统管理员经常询问如何控制 OOM Killer的行为。为了方便控制，引入了 /proc/ <pid> /oom_adj旋钮，以防止系统中的重要进程被杀死，并定义要杀死的进程的顺序。oom_adj的可能值范围从 -17 到 +15...
Nginx no-www to www and www to no-www
...x.html;
####
# now pull the site from one directory #
root /var/www/www.google.com/web;
# done #
location = /favicon.ico {
log_not_found off;
access_log off;
}
}
...
9个常用iptables配置实例 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...-j ACCEPT
类似的，对于HTTP/HTTPS(80/443)、pop3(110)、rsync(873)、MySQL(3306)等基于tcp连接的服务，也可以参照上述命令配置。
对于基于udp的dns服务，使用以下命令开启端口服务：
iptables -A OUTPUT -p udp -o eth0 --dport 53 -j ACCEPT
iptables -A IN...
Is there a performance difference between i++ and ++i in C++?
...it, even if you are not right now.
Knuth.
Premature optimization is the root of all evil. As is premature pessimization.
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Choosing a file in Python with simple Dialog
...t askopenfilename
Tk().withdraw() # we don't want a full GUI, so keep the root window from appearing
filename = askopenfilename() # show an "Open" dialog box and return the path to the selected file
print(filename)
Done!
s...
Recursively list files in Java
...ic class Filewalker {
public void walk( String path ) {
File root = new File( path );
File[] list = root.listFiles();
if (list == null) return;
for ( File f : list ) {
if ( f.isDirectory() ) {
walk( f.getAbsolutePath() );
...
android.view.InflateException: Binary XML file line #12: Error inflating class
...
I encountered the same bug and found the root reason is:
Use Application Context to inflate view.
Inflating with Activity Context fixed the bug.
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Adding a new SQL column with a default value
I am looking for the syntax to add a column to a MySQL database with a default value of 0
10 Answers
...
A top-like utility for monitoring CUDA activity on a GPU
...n linux, nVidia-smi 295.41 gives you just what you want. use nvidia-smi:
[root@localhost release]# nvidia-smi
Wed Sep 26 23:16:16 2012
+------------------------------------------------------+
| NVIDIA-SMI 3.295.41 Driver Version: 295.41 | ...
How to change Vagrant 'default' machine name?
... project is mapped to a VirtualBox VM via UUID, which is stored in PROJECT_ROOT/.vagrant/machines/default/virtualbox/id. This UUID is not visible in the VirtualBox GUI (virtualbox.org/ticket/6989), but you can use VBoxManage list vms on the command line.
– odigity
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