I have a bash script that I want to be executed before apache starts or restarts.
I want my bash script to be executed when apache starts during the bootup process and when I manually run "/etc/init.d/apache2 restart/start".
There is an init.d script "/etc/init.d/apache2" but I rather not touch that file.
Google is not very helpful :)
Because of the way /etc/init.d/apache2 is written, you can't hijack it by putting your script ahead of apache2ctl in the PATH and modifying or renaming /usr/sbin/apache2ctl would be more likely to get undone during an update. So that leaves you with a choice of modifying /etc/init.d/apache2 or magic.
It may be that the magic comes in the form of creating a symlink to your script in the appropriate /etc/rc?.d directories with an appropriate prefix that would cause it to run before Apache. On my system, the name might be S88scriptname, for example. You can make these links individually for each runlevel and manage them manually or, on systems such as Debian and Ubuntu that support it, you can model your script after /etc/init.d/skeleton and set the options in the LSB header appropriately (particularly the X-Start-Before keyword, perhaps) and use update-rc.d to manage the rc?.d symlinks for you.
Related
I have found that:
When I type the following on terminal:
php -i | grep php.ini
I get the output:
The Loaded Configuration file is # /etc/php5/cli/php.ini
However, from phpinfo(), I get to see:
The loaded ini file is # /etc/php5/apache2/php.ini
Which one of these is working right now? How is it possible to have two php.ini files ?
Depends on where you are running PHP from. If you run it from command line, it uses the cli/php.ini and apache2/php.ini when run through apache.
You are executing phpinfo() through the browser, hence you get /etc/php5/apache2/php.ini as the answer. Running php -r "phpinfo();" | grep "Loaded Configuration" from the terminal should output the CLI ini. Same function, context changes.
The advantage of this system is obviously to allow different configurations depending on the context. For a simplified example, you might want to have safe_mode on in apache but it's unnecessary in CLI mode.
Your .ini paths are actually quite unusual. Normally, the default .ini is just php.ini and CLI .ini is called php-cli.ini and they reside in the same folder.
I'm no expert on the subject but this should be the basic idea. If anyone has any corrections, I'd be happy to hear them.
I'm trying to run my static web app using Windows Subsystem for Linux (2), but I can't figure out where on my computer I should store the git repository to be able to run it decently quickly. I have tried storing it on under /mnt/c/{workfolder}, but it takes several minutes to start up (using npm run start), and I have to rerun to see any changes. This is useless when I'm trying to work...
I have also tried to store it in /mnt/wsl/{workfolder}, and in that case it starts up quickly and I can see my changes without rerunning the app. However, it seems to disappears when I restart my computer.
Where should I store the git repository to be able to run the app quickly and see changes without rerunning? I'm assuming there's something I'm not understanding, help me get this it you know.
You'll want it somewhere on the ext4 partition of the WSL distribution. Typically, the best place is going to be under your WSL /home/<username> folder.
I would recommend:
mkdir ~/src
# or
mkdir ~/projects
# or something similar
Then create subdirectories for each project in that directory.
Why the others don't work:
/mnt/c is the Windows C: drive. That drive is mounted into WSL2 using the 9P network file system, and yes, it's (a) slow, and (b) does not support inotify, so apps cannot register for notifications of changes to files.
/mnt/wsl is a tmpfs mount. It's really there for holding things that need to be shared between all running WSL instances. The auto-generated resolv.conf that you see there is one of those things. You can also use it for copying a file from one WSL distribution to another -- Simply copy the file to /mnt/wsl, start another WSL distribution, and copy or move the file out.
But yes, all tmpfs mounts are ephemeral and will terminate when the last WSL2 distribution/instance terminates.
For our development purposes, we have a base template installation of ExpressionEngine which is duplicated whenever we start a new project. This process involves copying the directory contents and changing ownership via SSH, then synchronizing the databases via phpMyAdmin.
I was wondering if it might be possible to compile a batch script (or equivalent) to perform all these operations via a single terminal command, and if so, I would appreciate some basic foundation on which to build the script.
You mean something like this?
#!/bin/sh
cp -R /foo /bar
chmod 644 /bar/*
mysql < default.sql
Note that I'm just importing a default file to MySQL, not synchronizing two different sets of data, but it doesn't sound like that's what you meant anyway.
I recently modify the "include_path" var in my php.ini file. Before you ask, I restarted the apache service. The change work for every pages we access from a web browser.
The problem is the cron jobs doesn't seems to consider that change. When I do a phpinfo() inside the cron job, it uses the same php.ini file than the web server and it is the one I changed, but the value beside "include_path" is the old one.
So is there a way to "restart" crontab?
Or maybe there is another problem?
Several systems use a separate php.ini file for web and CLI. You will need to make changes in that one as well: How to find the php.ini file used by the command line?
The easiest way to find this file is to run this at the command line: php --ini which will result in output like this:
user#computer:~$ php --ini
Configuration File (php.ini) Path: /etc/php5/cli
Loaded Configuration File: /etc/php5/cli/php.ini
Scan for additional .ini files in: /etc/php5/cli/conf.d
What you see as "Loaded Configuration File:" is where you need to add your changes.
EDIT: Another option, is in your CRON script use set_include_path() to make the change at runtime.
PHP generally has two .ini files. One for in-webserver (SAPI) and one for command-line (CLI) usage. If you modified only the SAPI one, then anything running from CLI (e.g. cron jobs) will not see the change.
do a php -i at the command line to see where PHP is looking for its ini file while in that mode.
I installed apache httpd on my linux vm and wanted to start it's service. BUt I'm getting error (13)Permission denied. Error retrieving pid file run/httpd.pid I realised that I do not have this file. Not even a var directory. Any solutions for this? Pardon me, this is my first time touching servers.
I installed the apache like this:
gzip -d httpd-2.2.21.tar.gz
tar xvf httpd-2.2.21.tar
./configure --prefix=/home/Hend/Desktop/Server
make
make install
You have several alternatives for this:
Install apache in user directory, run as non-root user
This is the way you started doing that. But then you'll have to:
Add some customizations to the start script, or at least pass it enough environment variables to tell him where configuration / pidfile / etc. are
Modify the whole apache configuration, since the default uses directories to which you don't have access. For example, you should put your DocumentRoot somewhere else thant /var/www
Run the server on a non-standard port. Since unprivileged users cannot run services on ports lower than 1024, you must run apache on another port, such as 8000 instead of 80. But this way, all your URLs will look like http://example.com:8000 instead of http://example.com.
Install apache from sources, into /usr/local
You can install apache in the default path for non-part-of-distro stuff, that is /usr/local instead of /usr/. That is, use --prefix=/usr/local/ when running configure.
This way, things should be much simpler. In any case, you'll have to run the webserver from root, and configure it to change user only after socket is opened.
Install apache from sources, into /usr/
You can also install apache in its default location, usint --prefix=/usr/. This way things should be much simpler, it should install init scripts in the usual location /etc/init.d/apache2 or /etc/init.d/httpd, configuration in /etc/apache2 etc.
Beware that doing this all the apache installed files will conflict with the ones of the version provided by your linux distribution!
Install apache from your distribution package manager
A part from the case in which you want particular setups (for example with non-standard patches), particular non-packaged versions (not recommended, since usually versions packaged with distros are guaranteed to be stable, others are not).
Benefits of doing this:
Avoid huge setup + configuration process to make it work
Versions from your distro should be "guaranteed" to be stable and tested with all the other programs shipped with it. Not always the latest version is better.
Each time a new release is updated (or more importantly, there is a security update), you can upgrade it semi-automatically by running a single upgrade command, without worrying about things going wrong during update.
This way the whole installation is just matter of a couple commands.
For example, on debian:
apt-get install apache2
On fedora:
yum install httpd
etc.
Then, if the service is not already started by package manager, you can start it with
/etc/init.d/apache2 start
or
/etc/init.d/httpd start
Job done. Now just put stuff in /var/www/ (or equivalent directory, depends on distro) and see it through you web server.
You have to start apache as root
Have you read the docs in the source distribution?
ie INSTALL
less INSTALL
For complete installation documentation, see [ht]docs/manual/install.html or
http://httpd.apache.org/docs/2.2/install.html
$ ./configure --prefix=PREFIX
$ make
$ make install
$ PREFIX/bin/apachectl start