qodeninja's questions

I'm trying to keep an application on my ubuntu server running so that Google has time ping it, but the app keeps shutting down when I log out.

I start the Nodejs app with supervisor to monitor changes (via a shell script)

I found commands like nohup, but I'm really clueless when it comes to running background services other than typing simple commands like service httpd start which seems to work pretty well for Apache on CentOS!

Do I need to create another user to run services on? I have a Linode instance with Ubuntu 10.04

run.sh

cd myapp/src/main/node
supervisor -w "myapp/src/main/node,myapp2/src/main/node,./" run-apps.js

I was playing aroudn with some variations of date like

DATE = $(date)

but that didnt work either

crontab -e

CRONLOG=/tmp/log/crontab.log
DATEVAR=`date +20\%y\%m\%d_\%H\%M\%S`
* * * * * echo $DATEVAR >> /tmp/log/crontab.log
*/2 * * * * echo "$DATEVAR hello" >> ${CRONLOG}
*/1 * * * * echo 'every minute' >> ${CRONLOG}

this just outputs the text as is...

I want to create a log entry in crontab.log with a timestamp on each update

How can I do this on CentOS 6?

UPDATE

DATEVAR=date +20%y%m%d_%H%M%S
*/1 * * * * /bin/echo [CRON] $($(DATEVAR)) >> /tmp/log/crontab.log

rendered only [CRON] and NOTHING when I tried it =/

I have to keep copying files over from my ~/src to /home/httpd directory, which is a pain when I'm making front end changes. Is there a way I can have changed files sync automagically? -- and specifically only while I'm developing -- something I can turn on and off.

I'm trying to copy my ssh key from my local vm to another box, everything seems to work ok, but when I check the remote box the file isnt there...

Transferred: stdin 0, stdout 0, stderr 0 bytes in 0.0 seconds

scp doesnt look it's writing anything, but I have no idea why!

I thought maybe it's because the internal network isnt exposed and maybe it's not able to talk to the remote box through scp, but it seems to be doing some handshaking... When I scp to a box in the network it works fine =/

Why wont scp work here?

I've checked the permissions on the remote box looks ok...

No error messages...

scp -v output

[user] > scp -v my.key.pub [email protected]:.ssh/
Executing: program /usr/bin/ssh host domain.net, user www, command scp -v -t .ssh/
OpenSSH_4.3p2, OpenSSL 0.9.8e-fips-rhel5 01 Jul 2008
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Connecting to domain.net [xxx.xxx.xxx.xxx] port 22.
debug1: Connection established.
debug1: permanently_set_uid: 0/0
debug1: identity file /root/.ssh/identity type -1
debug1: identity file /root/.ssh/id_rsa type -1
debug1: identity file /root/.ssh/id_dsa type -1
debug1: loaded 3 keys
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.1p1 Debian-5
debug1: match: OpenSSH_5.1p1 Debian-5 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_4.3
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-md5 none
debug1: kex: client->server aes128-ctr hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Host 'domain.net' is known and matches the RSA host key.
debug1: Found key in /root/.ssh/known_hosts:11
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password
debug1: Next authentication method: publickey
debug1: Trying private key: /root/.ssh/identity
debug1: Trying private key: /root/.ssh/id_rsa
debug1: Trying private key: /root/.ssh/id_dsa
debug1: Next authentication method: password
[user] > [email protected]'s password:
debug1: Authentication succeeded (password).
debug1: channel 0: new [client-session]
debug1: Entering interactive session.
debug1: Sending environment.
debug1: Sending env LANG = en_US.UTF-8
debug1: Sending command: scp -v -t .ssh/
Bash Src is loaded!


debug1: client_input_channel_req: channel 0 rtype exit-status reply 0
debug1: channel 0: free: client-session, nchannels 1
debug1: fd 0 clearing O_NONBLOCK
debug1: fd 1 clearing O_NONBLOCK
debug1: Transferred: stdin 0, stdout 0, stderr 0 bytes in 0.0 seconds
debug1: Bytes per second: stdin 0.0, stdout 0.0, stderr 0.0
debug1: Exit status 0

If you've used Wi-Fi at any cafe and other various hot spot places around town you might notice that sometimes in order to access the wi-fi you have to go to a login page or an agreements page before you can access the wifi network.

How do you set this up? What is necessary? Can you do this with any router? Can you do this with PHP?

I want to install Node.js on my box (CentOS 5) for testing and sandboxing but I can't uninstall Apache as recommend by developers using Nginx.

So what I'd like to do is have Nginx serving

nodejs.sandbox.net on IP 10.10.10.10

and Apache running (usual setup)

sandbox.net on 10.10.10.10

and then on my windows host file do something like

sandbox.net 10.10.10.10:80
nodejs.sandbox.net 10.10.10.10:8080

and by the way how do I install Nginx on CentOS 5 yum?

I want to pass some parameters as part of my ssh connection that I can use to set custom variables for my login to do certain things or run certain scripts. How do you do this running Putty on Windows machine, connecting via SSH to a CentOS machine?

I've found numerous installation instructions for Node.js but they all seem so complicated -- I'm not a super sys admin but I can get around. I have yum on the system, but I didn't find any node.js packages, and I'm not sure how to compile code on the server or where to put it.

Using Yum/CentOS.

The problem is that php 5.1 is already installed and running so

yum update php

dont work!

I looked around the net for a solution but they say to do the above =/

This htaccess snippet is supposed to redirect

myhost.com/?p=1&preview=true

to

alt.myhost.com/?p=1&preview=true

RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} ^myhost.com$ [NC]
RewriteRule ^/\?p=([0-9]+)&preview=true$ http://alt.myhost.com/?p=$1&preview=true [NC,R=301,L]

but for some reason I can't escape the / and ? part of the URL. Not sure why this isnt working...

I've tried escaping ?

\\? \? [?]

and I've tried escaping the /

\\/ \/ [/]

none of these seem to work either...

help!

I want to set an env variable that has the DOC_ROOT info but nothing

SetEnv PROJECT_BASE %{ENV:DOC_ROOT}
SetEnv LAYOUT_HOME  %{ENV:PROJECT_BASE}"/html/app/wordpress/"

and then be able to access LAYOUT_HOME in php

How can I do this? The above is not working for me...

The problem is the base path is different on diff environments =/

I'm trying to set a variable on Apache

ENV=DEV if the http host is the dev URL

or

ENV=PRD if the http host is the prd URL

and then use $_SERVER['ENV'] to create some logic branches

So far none of these have worked for me and we do have the setenvif module installed

SetEnvIfNoCase Referer
SetEnvIfNoCase Remote_Host

What's the right way to do this?

I write a lot of code from random projects but I never keep track of the version or changes. Ive used SVN enough that I feel like I should start keeping repositories of my code, but I dont know how to set it up or organize it for random projects.

Also can you use SVN to keep track of images?

This doesnt seem to work in .htacces:

SetEnv FOO %{ENV:BASH}

I need to do this without installing software...

Any ideas?

MSDOS (cmd.exe) on Windows XP

I managed to get the custom INI to load, but its still loading other .ini files from the default location.

I created an fcgi wrapper that passed the ini value as a parameter. That worked. Now just these other ini's need to be loaded from the same dir as my custom ini.

The problem is the other .ini files are overriding the settings in my custom php.ini =/

I realize the problem now is that the php.fcgi was compiled with a custom path parameter. So that's a problem. I might have to recompile it using a different location or none at all. I'd hate to have to compile an fcgi for each domain =/

is there some sort of .htaccess directive. I dont have access to httpd.conf.

I have php5 in a fastcgi/cgi module.

Multiple domains.

But for some reason all the domains are pointing to the first domains php.ini (the one I installed php with in the script)

not sure if that got compiled into the build, or if theres some setting I can change someplace

thanks much!

I know PHP fairly well. But one aspect of PHP which I am fairly green in is caching, loading balancing etc.

A lot of companies hiring PHP developers are looking for these high-use background, which I've never really developed an enterprise infrastructure with PHP.

This seems more like sys-admin type stuff, so I get a little flustered when companies are always asking for this experience. Anyway I guess I better learn.

Where's a good place to start learning all this stuff?

I followed this # script on my webhost's wiki to setup a custom install of PHP5, but now theyre telling me they need to move my account to a 64-bit server, and I have no idea how to set this up. APC needs the PHP5 installation to use cgi/fastcgi. I Dunno how that applies to 64-bit or what other considerations need to be made.

Does anyone have any idea how to do this, or by least changing the #script to compile using the 64-bit PHP.

I'm learning so much from this site, thanks for your help.

which shows my local install of php

and whereis php shows the global php install (shared env)