Doku Wiki

rh124_account_management - [Giving someone superuser access]

rpjday (rpjday@undisclosed.example.com) — 2026-10-24T21:11:47+00:00

RH124 Account Management TO ADD * getent * nsswitch.conf * how to lock a user account (passwd -l, usermod -L) Typical tasks related to accounts * create new user accounts, new groups and assign users to groups * remove users and groups as necessary

rh124_dnf - [Working with groups]

rpjday (rpjday@undisclosed.example.com) — 2026-10-24T17:42:27+00:00

RHEL 10 dnf command TO ADD * plugins * excluding packages /etc/dnf and dnf.conf $ tree -F /etc/dnf /etc/dnf/ ├── aliases.d/ ├── dnf.conf ├── modules.d/ ├── modules.defaults.d/ ├── plugins/ │ ├── copr.conf │ ├── copr.d/ │ └── debuginfo-install.conf ├── protected.d/ │ ├── almalinux-release.conf │ ├── grub2-pc.conf │ ├── grub2-tools-minimal.conf │ ├── selinux-policy-targeted.conf │ ├── setup.conf │ ├── sudo.conf │ ├── systemd.conf │ └── yum.conf ├── usr-drift-protecte…

rh124_package_management - [TO DO]

rpjday (rpjday@undisclosed.example.com) — 2026-10-24T10:17:06+00:00

RH124 Package Management TO DO * add epel-release repo * dnf config-manager and editing config files * dnf plugins * flatpak * no gpgcheck * downloading .rpm files, then installing them Helpful links * Managing software with the DNF tool * DNF commands list * Using the DNF software package manager * DNF Command Reference The commands

rh124_rpm - [Possible contents of an RPM package]

rpjday (rpjday@undisclosed.example.com) — 2026-10-23T20:20:56+00:00

RHEL 10 rpm command Examine installed RPM packages $ rpm --query --all $ rpm -qa $ rpm -qa | wc -l $ dnf list --installed | wc -l $ rpm -qa "kernel*" $ rpm -q tree tree-2.1.0-8.el10.x86_64 $ $ rpm --help | less List user-installed packages: $ dnf history userinstalled Packages installed by user chrony-4.8-2.el10.x86_64 dos2unix-7.5.2-3.el10.x86_64 grub2-pc-1:2.12-46.el10_2.alma.1.x86_64 grub2-tools-1:2.12-46.el10_2.alma.1.x86_64 kdump-utils-1.0.58-15.el10.x86_64 kernel-6.12.0-211.7.3.e…

rh124_ssh - [The SSH host keys]

rpjday (rpjday@undisclosed.example.com) — 2026-10-23T13:39:06+00:00

RH124 SSH configuration Overview Both client and server side configuration and usage of SSH involves three packages: * openssh-server * openssh-clients * openssh We will examine these packages shortly. Starting and stopping the SSH service

rh124_sudo - [Very abbreviated /etc/sudoers]

rpjday (rpjday@undisclosed.example.com) — 2026-10-23T10:41:11+00:00

RH124 sudo and sudoers file Ask Google Does EX200 exam ask about sudo and sudoers file? “Yes, the Red Hat Certified System Administrator (RHCSA) EX200 exam can test you on sudo and the sudoers file as part of its User and Group Management objectives.

rh124

rpjday (rpjday@undisclosed.example.com) — 2026-10-23T09:28:29+00:00

RH124 course pages * RH124 Package Management * RH124 Account Management * RH124 Advanced Permissions * RH124 sudo * RH124 SSH * RH124 systemd

rh124_advanced_permissions - [Ask Google]

rpjday (rpjday@undisclosed.example.com) — 2026-10-23T09:27:12+00:00

RH124 Advanced Permissions Strange permissions It is entirely possible to set bizarre permissions on files or directories (edited for clarity): $ ls -l letter -[rw-][r--][r--]. 1 rpjday rpjday 1043 Nov 28 2011 letter (u) (g) (o) $ chmod 077 letter $ ls -l letter -[---][rwx][rwx]. 1 rpjday rpjday 1043 Nov 28 2011 letter $ cat letter cat: letter: Permission denied $ chmod 644 letter $

lec_imx6_1.jpg - created

rpjday (rpjday@undisclosed.example.com) — 2025-10-20T11:03:18+00:00

git_book.jpeg - created

rpjday (rpjday@undisclosed.example.com) — 2018-05-24T16:13:44+00:00

git_book.jpg - created

rpjday (rpjday@undisclosed.example.com) — 2018-05-24T16:09:16+00:00