AIDE - Build, Store, and Test Database
Generate a new database:
By default, the database will be written to the file /var/lib/aide/aide.db.new.gz.
The database, as well as the configuration file /etc/aide.conf and the binary /usr/sbin/aide (or hashes of these files) should be copied and stored in a secure location. Storing these copies or hashes on read-only media may provide further confidence that they will not be altered.
Install the newly-generated database:
# cp /var/lib/aide/aide.db.new.gz /var/lib/aide/aide.db.gz
Run a manual check:
If this check produces any unexpected output, investigate.
Choosing which main PHP version to build
Though it is possible to enable both PHP 4 and PHP 5, Cpanel recommend only enabling one version of PHP. This is because when only one version is installed, the binaries are configured in such a way to mirror EasyApache’s installation, simplifying configuration and management.
A CGI binary is installed in /usr/bin/php.
A CLI binary is installed in /usr/local/bin/php
.
When both PHP 4 and PHP 5 are enabled, PHP 5 is installed in the standard locations, listed above, while:
A CGI binary for PHP 4 is installed in /usr/php4/bin/php.
A CLI binary for PHP 4 is installed in /usr/local/php4/bin/php.
Pls Note: PHP 4 is no longer supported by its developers. WCpanel strongly recommend you use PHP 5.
Cpanel Apache build Summary
When Apache is rebuilt using EasyApache, the current configuration is processed and stored. After the build process is complete, the new Apache configuration file is processed to yield a new template and add any missing configuration values.
Finally, the previous data stores and the new template are used to generate the completed Apache configuration file.
Reference: http://cpanel.net
CPAN - query, download and build perl modules from CPAN sites
Interactive mode:
Batch mode:
use CPAN;
autobundle, clean, install, make, recompile, test
Example:
root@laptop:~# perl -MCPAN -e shell
Terminal does not support AddHistory.
cpan shell -- CPAN exploration and modules installation (v1.9205)
ReadLine support available (maybe install Bundle::CPAN or Bundle::CPANxxl?)
cpan[1]> test
CPAN: Storable loaded ok (v2.18)
CPAN: LWP::UserAgent loaded ok (v5.819)
CPAN: Time::HiRes loaded ok (v1.9711)
I would like to connect to one of the following sites to get ‘authors/01mailrc.txt.gz’:
http://www.perl.org/CPAN/
ftp://ftp.perl.org/pub/CPAN/
Is it OK to try to connect to the Internet? [yes]
Source: Man Page - http://theoryx5.uwinnipeg.ca/CPAN/perl/lib/CPAN.html
Scanning Disks for Volume Groups to Build the Cache File
The vgscan command scans all supported disk devices in the system looking for LVM physical volumes and volume groups. This builds the LVM cache in the /etc/lvm/.cache file, which maintains a listing of current LVM devices.
LVM runs the vgscan command automatically at system startup and at other times during LVM operation, such as when you execute a vgcreate command or when LVM detects an inconsistency. You may need to run the vgscan command manually when you change your hardware configuration, causing new devices to be visible to the system that were not present at system bootup. This may be necessary, for example, when you add new disks to the system on a SAN or hotplug a new disk that has been labeled as a physical volume.
You can define a filter in the lvm.conf file to restrict the scan to avoid specific devices.
SYNOPSIS
DESCRIPTION
lvm.conf is loaded during the initialisation phase of lvm (8). This file can in turn lead to other files being loaded - settings read in later override earlier settings. File timestamps are checked between commands and if any have changed, all the files are reloaded.
Use lvm dumpconfig to check what settings are in use.
# lvm dumpconfig
devices {
dir=”/dev”
scan=”/dev”
preferred_names=[]
filter=”a/.*/”
cache_dir=”/etc/lvm/cache”
cache_file_prefix=”"
write_cache_state=1
sysfs_scan=1
md_component_detection=1
ignore_suspended_devices=0
}
