小编ohh*_*hho的帖子

ls -al / 显示一个文件夹：

drwxrwxrwt 2 root root 4096 Feb 26 09:00 tmp

中的最后一个字符t是什么意思drwxrwxrwt？

如何检查两个主机之间是否存在特定端口（例如 1433）的路由。

a后yum update，启动apache时出现错误，在/var/log/httpd/error_log：

[notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
[error] SSL Library Error: -8181 Certificate has expired
[error] Unable to verify certificate 'Server-Cert'. Add "NSSEnforceValidCerts off" to nss.conf so the server can start until the problem can be resolved.

现在我暂时放NSSEnforceValidCerts off于nss.conf有网站的运行。我该如何修复错误？

在rvmCentOS 5.8 上安装后：

[rails@localhost ~]$ rvm -v
rvm 1.16.17
[rails@localhost ~]$ which ruby
~/.rvm/rubies/ruby-1.9.3-p286/bin/ruby
[rails@localhost ~]$ ruby -v
ruby 1.9.3p286 (2012-10-12 revision 37165) [i686-linux]
[rails@localhost ~]$ which gem
~/.rvm/rubies/ruby-1.9.3-p286/bin/gem

有一个警告：

$ gem -v
/home/rails/.rvm/rubies/ruby-1.9.3-p286/lib/ruby/1.9.1/yaml.rb:56:in `<top (required)>':
It seems your ruby installation is missing psych (for YAML output).
To eliminate this warning, please install libyaml and reinstall your ruby.
1.8.24

我遵循了一些建议：

$ rvm pkg install libyaml
Fetching yaml-0.1.4.tar.gz to /home/rails/.rvm/archives
Extracting yaml-0.1.4.tar.gz to /home/rails/.rvm/src
Prepare yaml in …

在 CentOS 上的 Drupal 安装中，有许多文件夹具有以下权限：

drwxr-xr-x  8    6226    6226 4096 Jan  7 21:46 cck

用户/组 6226 不是我创建的。怎么会有这样的用户/组？谢谢！

# bash --version
GNU bash, version 3.1.17(1)-release (i686-redhat-linux-gnu)

# yum install bash
Failed to set locale, defaulting to C
Loading "installonlyn" plugin
Setting up Install Process
Setting up repositories
rpmforge                  100% |=========================| 1.9 kB    00:00     
Reading repository metadata in from local files
primary.xml.gz            100% |=========================| 4.0 MB    00:05     
rpmforge  : ################################################## 11467/11467
Parsing package install arguments
Nothing to do