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How to test an Internet connection with bash?
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Ping your default gateway:
#!/bin/bash
ping -q -w 1 -c 1 `ip r | grep default | cut -d ' ' -f 3` > /dev/null && echo ok || echo error
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Convert line-endings for whole directory tree (Git)
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Piping find to xargs will fail if find matches any files with whitespace, quotes, or other shell meta characters in their path. At the least use find blog -type f -print0 | xargs -0 dos2unix to handle the case of whitespace. Y...
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...
How to get current page URL in MVC 3
...ilding. It has some FBXML tags that are interpreted by the facebook javascript that is referenced on the page.
9 Answers
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SPA best practices for authentication and session management
...ent-side. Before we do that, though, there's an important prelude:
Javascript Crypto is Hopeless
Matasano's article on this is famous, but the lessons contained therein are pretty important:
https://www.nccgroup.trust/us/about-us/newsroom-and-events/blog/2011/august/javascript-cryptography-consid...
Using capistrano to deploy from different git branches
... option '-s' (--set) stands for 'Set a variable after the recipes are loaded.' and option 'S' (--set-before) stands for 'Set a variable before the recipes are loaded.'
– Ramon Caldeira
Jul 30 '14 at 16:05
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Amazon S3 - HTTPS/SSL - Is it possible? [closed]
...dFront made this change by allowing you to choose between SNI or Dedicated IP SSL. Dedicated IP SSL continues to cost $600, but SNI SSL is free. Just make sure the browsers you're targeting support SNI.
– Ryan Pendleton
Jun 21 '15 at 21:57
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Best TCP port number range for internal applications [closed]
...to use any port because your clients should be configurable to talk to any IP address and port!
If they're not, then they haven't been done very well. Go back and do them properly :-)
In other words, run the server at IP address X and port Y then configure clients with that information. Then, if y...
App Inventor 2 拓展参考文档 · App Inventor 2 中文网
...拓展：数据表格视图，表格形式显示列表
【剪贴板】 Clipboard 拓展：实现剪贴板的复制粘贴功能
【Socket】 ClientSocketAI2Ext 拓展加强版：TCP/IP传输协议
【FTP】 FTP 客户端拓展：FTP协议连接、上传、下载、创建、修改目录等
【...