Red Hat RHCSA objectives: user and group management, storage with LVM and XFS, systemd, networking with nmcli, SELinux basics and firewalld.
40 cards · basic cards · AI-written, checked twice. Edit anything.
- Command to add a new user named 'jsmith' to the system
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useradd jsmith- Remove a user and their home directory
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userdel -r username- Set a user's password to expire in 30 days
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chage -M 30 username- Create a new group named 'developers'
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groupadd developers- Add existing user 'jsmith' to group 'developers' without removing from other groups
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usermod -aG developers jsmith- Show all groups a user belongs to
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groups jsmith- Change file owner to user 'jsmith' and group 'developers'
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chown jsmith:developers /path/to/file- Set default login shell for user 'jsmith' to bash
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usermod -s /bin/bash jsmith- Initialize a physical volume for LVM on /dev/sdb1
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pvcreate /dev/sdb1- Create volume group 'vg_data' using physical volume /dev/sdb1
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vgcreate vg_data /dev/sdb1- Create logical volume 'lv_home' with size 10GB in volume group 'vg_data'
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lvcreate -L 10G -n lv_home vg_data- Extend logical volume /dev/vg_data/lv_home by 5GB
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lvextend -L +5G /dev/vg_data/lv_home- Reduce logical volume /dev/vg_data/lv_home by 2GB
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lvreduce -L -2G /dev/vg_data/lv_home- Remove logical volume /dev/vg_data/lv_home
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lvremove /dev/vg_data/lv_home- List all physical volumes in the system
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pvs
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