Chroot jails made simpler
jk_uchroot
jk_uchroot sets up users of the main system who can use the chroot. The list of users and which chroots they can use is kept in /etc/jailkit/jk_uchroot.ini. Some sample entries include:
[jwl] allowed_jails = /srv/johnjail, /srv/commonjail skip_injail_passwd_check = 1 [group users] allowed_jails = /srv/commonjail skip_injail_passwd_check = 1
Notice the optional last line in each entry that skips the password check.
jk_user
Use this utility to move an existing user account into a chroot. If the --move (-m) option is used, the user's entire home directory is placed in the chroot's directory /home/USER. The user will no longer have access to the main system.
jk_procmailwrapper
Not all chroots require email. For those that do, jk_procmailwrapper runs procmail. For users with access to the main system, it provides access to their normal .procmailrc file. If procmail is installed within the chroot, jailed users can use the .procmailrc in their home directory in the chroot.
Buy this article as PDF
(incl. VAT)
Buy Linux Magazine
US / Canada
UK / Australia
Subscribe to our Linux Newsletters
Find Linux and Open Source Jobs
Subscribe to our ADMIN Newsletters
Support Our Work
Linux Magazine content is made possible with support from readers like you. Please consider contributing when you’ve found an article to be beneficial.
News
-
Gnome 48 Debuts New Audio Player
To date, the audio player found within the Gnome desktop has been meh at best, but with the upcoming release that all changes.
-
Plasma 6.3 Ready for Public Beta Testing
Plasma 6.3 will ship with KDE Gear 24.12.1 and KDE Frameworks 6.10, along with some new and exciting features.
-
Budgie 10.10 Scheduled for Q1 2025 with a Surprising Desktop Update
If Budgie is your desktop environment of choice, 2025 is going to be a great year for you.
-
Firefox 134 Offers Improvements for Linux Version
Fans of Linux and Firefox rejoice, as there's a new version available that includes some handy updates.
-
Serpent OS Arrives with a New Alpha Release
After months of silence, Ikey Doherty has released a new alpha for his Serpent OS.
-
HashiCorp Cofounder Unveils Ghostty, a Linux Terminal App
Ghostty is a new Linux terminal app that's fast, feature-rich, and offers a platform-native GUI while remaining cross-platform.
-
Fedora Asahi Remix 41 Available for Apple Silicon
If you have an Apple Silicon Mac and you're hoping to install Fedora, you're in luck because the latest release supports the M1 and M2 chips.
-
Systemd Fixes Bug While Facing New Challenger in GNU Shepherd
The systemd developers have fixed a really nasty bug amid the release of the new GNU Shepherd init system.
-
AlmaLinux 10.0 Beta Released
The AlmaLinux OS Foundation has announced the availability of AlmaLinux 10.0 Beta ("Purple Lion") for all supported devices with significant changes.
-
Gnome 47.2 Now Available
Gnome 47.2 is now available for general use but don't expect much in the way of newness, as this is all about improvements and bug fixes.