Callmeed's questions

I wan't to provide SSH/RSYNC like features to users of my app. I'd like them to just be able to paste/save an SSH key into my app similar to how GitHub does:

So, my question is, once I let users save their key (preferably in the database):

Is there a way I can provide/mimic SSH/RSYNC features without actually creating Linux user accounts? I'd love to be able to authorize based on their database-stored public key and let them RSYNC in/out of a specific folder (say, based on their username in the app, for example).

(if it matters, it will be a Rails app deployed to an Ubuntu server)

I want to send the output of uptime and df commands to a web app using cURL. I tried:

uptime | curl http://someurl.com -T -

But that didn't seem to send the data.

What is the proper way to send the output of a command to cURL as a POST parameter? (or wget if that's much easier)

I have a signup page on a subdomain like: https://signup.example.com

It should only be accessible via HTTPS but I'm worried people might somehow stumble upon it via HTTP and get a 404.

My html/server block in nginx looks like this:

html {
  server {
    listen 443;
    server_name signup.example.com;

    ssl                        on;
    ssl_certificate        /path/to/my/cert;
    ssl_certificate_key  /path/to/my/key;

    ssl_session_timeout 30m;

    location / {
      root /path/to/my/rails/app/public;
      index index.html;
        passenger_enabled on;
    }
  }
}

What can I add so that people who go to http://signup.example.com get redirected to https://signup.example.com ? (FYI I know there are Rails plugins that can force SSL but was hoping to avoid that)

I have several files of the same name (say, somefile.php) scattered within several directories under /var/

If I want to replace all of them with a new version of somefile.php located in, say, /home/me/somefile.php ... how would I do that? Every search result I find relates to replacing text in a file but I want to replace the entire file.

I know I can find all the files with:

find /var/ -type f -name somefile.php 

But I'm not sure how to move /home/me/somefile.php into the results and replace 'em all.

I've got a fresh CentOS 5.5 box and have installed Webmin+VirtualMin 3.79. I've enabled UserDir in apache and the sites are visible via http://ipaddress/~user/ but PHP does not work. (PHP works fine if I visit the site via it's domain)

Here's what I put in my httpd.conf to get where I'm at:

<IfModule mod_userdir.c>
    UserDir public_html
</IfModule>
<Directory /home/*/public_html>
  Options -Indexes +IncludesNOEXEC +FollowSymLinks +ExecCGI
  allow from all
  AllowOverride All
  AddHandler fcgid-script .php
  AddHandler fcgid-script .php5
</Directory>

When I try to hit a PHP file, I get a 500 error and the following is logged to /var/log/httpd/error_log:

suexec failure: could not open log file
fopen: Permission denied

Any help/direction is appreciated.

I have 2 nearly identical dedicated servers with the same provider. They also run a nearly identical software stack: RedHat 5 64-bit, Plesk, PHP, Apache, & MySQL. We use them for hosting custom sites we build.

The problem is, while our 1st server has a load average (in top) of around 0.3, the 2nd server consistently has a load average of around 4.0 or higher. Basic functions in Plesk are delayed and there is a bit of latency when executing shell commands.

Anyone have ideas why it would be so high? And why it would differ from our other server so much?

Here is my current top output (sorted by %MEM) ...

Any help is much appreciated ...

top - 21:48:04 up 100 days,  4:28,  1 user,  load average: 3.74, 4.20, 4.23
Tasks: 336 total,   1 running, 335 sleeping,   0 stopped,   0 zombie
Cpu(s):  0.8%us,  0.4%sy,  0.0%ni, 91.3%id,  7.5%wa,  0.0%hi,  0.0%si,  0.0%st
Mem:  12290884k total, 11886452k used,   404432k free,  2920212k buffers
Swap:  2096472k total,      244k used,  2096228k free,  6560692k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND                                                                                                               
22536 apache    15   0  860m 547m 6484 S  0.0  4.6   0:10.96 httpd                                                                                                                  
26467 apache    15   0  859m 546m 6408 S  0.0  4.5   0:07.67 httpd                                                                                                                  
 3620 apache    15   0  859m 545m 5552 S  0.0  4.5   0:06.15 httpd                                                                                                                  
 1895 apache    15   0  858m 544m 6356 S  0.0  4.5   0:08.25 httpd                                                                                                                  
16933 apache    15   0  858m 544m 5488 S  0.0  4.5   0:01.57 httpd                                                                                                                  
 6431 apache    15   0  856m 542m 6076 S 10.6  4.5   0:05.32 httpd                                                                                                                  
14417 apache    15   0  856m 542m 5568 S  0.0  4.5   0:03.88 httpd                                                                                                                  
15403 apache    15   0  855m 541m 5616 S  0.0  4.5   0:03.73 httpd                                                                                                                  
19165 apache    15   0  853m 539m 6252 S  0.0  4.5   0:12.40 httpd                                                                                                                  
15898 apache    15   0  852m 539m 5376 S  0.0  4.5   0:02.68 httpd                                                                                                                  
14401 apache    15   0  851m 538m 5460 S  0.0  4.5   0:02.97 httpd                                                                                                                  
15393 apache    15   0  851m 538m 5404 S  0.0  4.5   0:03.12 httpd                                                                                                                  
15427 apache    15   0  851m 538m 5496 S  0.0  4.5   0:02.44 httpd                                                                                                                  
14412 apache    15   0  851m 538m 5324 S  0.0  4.5   0:02.15 httpd                                                                                                                  
18330 apache    15   0  851m 537m 5136 S  0.0  4.5   0:01.30 httpd                                                                                                                  
18303 apache    15   0  848m 535m 5140 S  0.0  4.5   0:00.47 httpd                                                                                                                  
21190 apache    15   0  845m 533m 3988 S  0.0  4.4   0:00.33 httpd                                                                                                                  
15923 root      18   0  822m 521m 9928 S  0.0  4.3  10:04.81 httpd                                                                                                                  
22021 apache    15   0  828m 520m 4964 S  0.0  4.3   0:00.16 httpd                                                                                                                  
22146 apache    15   0  823m 515m 3016 S  0.0  4.3   0:00.02 httpd                                                                                                                  
22345 apache    15   0  822m 514m 2408 S  0.0  4.3   0:00.00 httpd                                                                                                                  
14721 apache    15   0  733m 510m  488 S  0.0  4.3   0:00.00 httpd                                                                                                                  
 5094 root      15   0 1452m 122m  15m S  1.0  1.0 852:24.24 java                                                                                                                   
 4636 mysql     15   0  532m  57m 6440 S  1.0  0.5 488:05.84 mysqld                                                                                                                 
 4799 popuser   15   0  166m  53m 2368 S  0.0  0.4   0:36.64 spamd                                                                                                                  
16761 popuser   15   0  159m  46m 2312 S  0.0  0.4   0:00.38 spamd                                                                                                                  
 4797 root      15   0  158m  45m 2448 S  0.0  0.4   0:01.27 spamd                                                                                                                  
 5074 root      34  19  255m  20m 2144 S  0.0  0.2   1:37.53 yum-updatesd                                                                                                           
 9917 named     15   0  366m 9804 1980 S  0.0  0.1   0:10.26 named                                                                                                                  
 4332 sso       18   0  119m 8028 5212 S  0.0  0.1   0:00.06 sw-engine-cgi                                                                                                          
 4341 sso       18   0  119m 8028 5212 S  0.0  0.1   0:00.07 sw-engine-cgi                                                                                                          
 4350 sso       18   0  119m 8028 5212 S  0.0  0.1   0:00.09 sw-engine-cgi                                                                                                          
 4352 sso       18   0  119m 8028 5212 S  0.0  0.1   0:00.11 sw-engine-cgi                                                                                                          
 4376 ntp       15   0 23388 5020 3896 S  0.0  0.0   0:00.58 ntpd                                                                                                                   
 4331 sw-cp-se  15   0 61336 4572 1480 S  0.0  0.0   5:53.22 sw-cp-serverd                                                                                                          
 4213 haldaemo  15   0 31252 4460 1684 S  0.0  0.0   0:01.52 hald                                                                                                                   
 4778 postgres  18   0  117m 4164 3484 S  0.0  0.0   0:00.11 postmaster                                                                                                             
18555 root      16   0 98.3m 3716 2852 S  0.0  0.0   0:00.01 sshd                                                                                                                   
 4488 sso       18   0  119m 3044  224 S  0.0  0.0   0:00.00 sw-engine-cgi                                                                                                          
 4489 sso       18   0  119m 3044  224 S  0.0  0.0   0:00.00 sw-engine-cgi                                                                                                          
 4492 sso       18   0  119m 3044  224 S  0.0  0.0   0:00.00 sw-engine-cgi                                                                                                          
 4493 sso       18   0  119m 3044  224 S  0.0  0.0   0:00.00 sw-engine-cgi                                                                                                          
 4490 sso       18   0  119m 3040  220 S  0.0  0.0   0:00.00 sw-engine-cgi                                                                                                          

I was clearing out some old sites on a CentOS server (MediaTemple DV) and stumbled upon this when doing an ls -lha : http://skitch.com/callmeed/ntgb5/weird-directory-listing

alt text http://img.skitch.com/20100119-cdgske12wthd63q4adk1uumr1e.jpg

All the file names are flashing and I'm not able to remove any of the files with rm -f

What does this mean? Drive/disk problems?

We have a Rails app used for support & help tickets.

It sends customers a confirmation email when they submit a request. It also sends an email when we reply to their request. It does not receive mail.

Within the last week, 25%+ of our customers stopped getting their replies. They think we aren't replying to their ticket (when we actually are).

I did a test with my @yahoo.com account and found this in the mail.log file:

Jul  9 16:11:45 bighelp postfix/smtp[9051]: BF673324365: host b.mx.mail.yahoo.com[66.196.97.250] said: 451 Message temporarily deferred - [140] (in reply to end of DATA command)
Jul  9 16:11:45 bighelp postfix/smtp[9051]: BF673324365: to=<[email protected]>, relay=d.mx.mail.yahoo.com[68.142.202.247]:25, delay=0.73, delays=0.02/0.02/0.64/0.05, dsn=4.0.$

Other non-yahoo addresses are experiencing this as well.

The Rails app is running on Ubuntu and we are sending via:

ActionMailer::Base.delivery_method = :sendmail

I made sure the server isn't an open relay.

What else can I do to ensure most of our emails get through?

On one of our Linux servers (running Plesk for basic hosting), QMail crashes/shuts down and all users on the server can't get mail.

This happens about 2 or 3 times a week. No other services are affected (apache keeps humming along just fine).

What are some options for checking/restarting QMail in this scenario? Some sort of cron job–or perhaps install ruby and god?