- 09 July 2023
Ansible is a great tool for automating tasks on multiple servers. It is easy to learn and use and it is very powerful. Ansible is written in Python and it uses SSH to connect to the servers or devices you want to manage like routers, switches, etc. There needs to be a central server where Ansible is installed and from there you can manage all your servers or devices.
In this post, we will create that central server and install Ansible on Debian 12 “bookworm” from the official Debian repositories. The first step is to update the system to the latest packages so that we can install Ansible from the official Debian repositories.
- 28 January 2015
Installing and configuring SSL certificates is always an issue as to how to create them and where to store them. Most of the time people can find the procedure on how to create them, but they forget all the places where they have placed them. Some initiatives exist to have centralized key stores on systems, but getting applications to use them is still a problem.
Also on Debian is this an issue and key material is all over the system if youre not careful. Some Debian developers tried to fix it, but it ended in a “stalemate” and for now, an additional package called
ssl-cert exists to create self-signed certificates. This package also provides a structure for storing commercial certificates and accessing them in a safer way. We install the package
ssl-cert for this.
- 07 July 2012
Creating home directories for new users can be a difficult task and especially in an LDAP-based environment, but most PAM installations have the option to create a new home directory before the user login is completed. Debian also ships the module mpam_mkhomedir, but without a manifest to set it up correctly. Bug 640918 covers this issue, but for now, creating the file
/usr/share/pam-configs/mkhomedir with the content below resolves the problem.
After creating the file, the command below updates the PAM-config to create the home directory when a user’s home directory doesn’t exist. In the example configuration above the default umask is 0027 so only the user and group will have access to the home directory.
- 09 August 2011
After upgrade Debian to kernel 3.0.0, I saw a hidden file called
/etc which I didn’t noticed before. Checking other machines gave the same result as shown below, but both without a matching Debian-package or manpage.
As time match at least the installation date of the machine and exists on other machines it appears to be a valid file, but with what purpose? After reading the Linux Programmer’s Manual two functions called lckpwdf and ulckpwdf where candidates for using this file. Checking the source code at Sourceware confirmed that both lckpwdf and ulckpwdf are using the file. And reading the manpage about these functions also confirms its purpose, a lock file the commands like passwd.