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解决xrdp登陆一直黑屏的问题：显示通道被占用 - 操作系统(内核) - 清泛网移...
...建议安装多款远程桌面工具。
记录一下调查步骤：
cat /var/log/xrdp-sesman.log #发现显示通道204启动超时，其他Xserver可能已占用该通道
ps -elf|grep vnc
kill {PID of vnc}
通道启动超时的日志如下：
[ERROR] X server for display 204 startup t...
Linux bpftrace学习笔记（持续更新） - 操作系统(内核) - 清泛网移动版 - ...
... 2 /usr/lib/locale/en_US.UTF-8/LC_CTYPE
[...]
脚本内容如下：
# cat /usr/share/bpftrace/tools/opensnoop.bt
#!/usr/bin/bpftrace
/*
* opensnoop Trace open() syscalls.
* For Linux, uses bpftrace and eBPF.
*
* Also a basic example of bpftrace.
*
* USAGE: opensnoo...
解决xrdp登陆不上的问题：xrdp session: Login failed for display 0 - 操...
...问题。
解决：通过设置sesman.in文件内的参数，解决。
cat /etc/xrdp/sesman.ini
[Sessions]
X11DisplayOffset=10
MaxSessions=50
KillDisconnected=1
IdleTimeLimit=0
DisconnectedTimeLimit=0
可以修改会话设置 ：将最大会话限制该大 MaxSessions=50
将KillDisco...
解决xrdp登陆一直黑屏的问题：显示通道被占用 - 操作系统(内核) - 清泛网 -...
...建议安装多款远程桌面工具。
记录一下调查步骤：
cat /var/log/xrdp-sesman.log #发现显示通道204启动超时，其他Xserver可能已占用该通道
ps -elf|grep vnc
kill {PID of vnc}
通道启动超时的日志如下：
[ERROR] X server for display 204 startup t...
Linux bpftrace学习笔记（持续更新） - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
... 2 /usr/lib/locale/en_US.UTF-8/LC_CTYPE
[...]
脚本内容如下：
# cat /usr/share/bpftrace/tools/opensnoop.bt
#!/usr/bin/bpftrace
/*
* opensnoop Trace open() syscalls.
* For Linux, uses bpftrace and eBPF.
*
* Also a basic example of bpftrace.
*
* USAGE: opensnoo...
CSS background opacity with rgba not working in IE 8
...
Though late, I had to use that today and found a very useful php script here that will allow you to dynamically create a png file, much like the way rgba works.
background: url(rgba.php?r=255&g=100&b=0&a=50) repeat;
background: rgba(255,100,0,0.5);
The script can be down...
Does PostgreSQL support “accent insensitive” collations?
...in the SQL function wrapper. Not meant to be used on its own.
The sophistication is needed as there is no way to hard-wire the dictionary in the declaration of the C function. (Would require to hack the C code itself.) The SQL wrapper function does that and allows both function inlining and express...
How to use FormData for AJAX file upload?
...OST",
enctype: 'multipart/form-data',
url: "upload.php",
data: data,
processData: false,
contentType: false,
cache: false,
timeout: 600000,
success: function (data) {
console.log();
...
Difference between \w and \b regular expression meta characters
...javascriptkit.com/javatutors/redev2.shtml
http://www.virtuosimedia.com/dev/php/37-tested-php-perl-and-javascript-regular-expressions
http://www.i-programmer.info/programming/javascript/4862-master-javascript-regular-expressions.html
I found this to be a very useful book:
Mastering Regular Expres...
What is the best place for storing uploaded images, SQL database or disk file system? [closed]
...the rest of your app. Then your img tags would reference "my_website/image.php?img_id=55" instead of "my_website/avatar.png", and your image.php script would, after verifying your credentials and parsing the id you hand it, return the actual image. That way, the image is only viewable by the proper ...