Standard partitions require all data to be contiguous. This causes some problems when you want to resize a partition in the middle of a drive. Logical volume management gives us the power to get around such problems. In this video you add a partition to a volume group and then create a logical volume from it.
- [Instructor] There are limitations to standard partitions.…They have to be contiguous on the disk.…If you want to resize a partition in the middle of a disk,…you're out of luck.…Logical volume management provides…tools to avoid this situation.…If there's room in a volume group,…you can resize a logical volume…even if the empty space is somewhere else on the disk.…If there is no room in the volume group, you can just add…another drive to it on the fly,…and then the logical volume…can be expanded across both drives.…To create a LVM system, we need to add a partition…or drive to an LVM volume group,…and then divide that volume group into logical volumes.…
We'll use the partition we created…in the last video for this.…To prepare it for LVM use,…we need to make it a physical volume.…In the terminal, type in sudo, space, pvcreate,…space, /dev/vdb1 and hit enter.…Type in your password if prompted, and hit Enter again.…We can verify this with PVS, or Physical Volume Summary.…Type in sudo, space, pvs, and hit Enter.…We see that we have a physical volume of 500 megs.…
Author
Grant McWilliams
Released
8/31/2017Instructor Grant McWilliams covers network and internet services administration, kernel management, and intrusion prevention. He shows how to make your systems more efficient with virtualization, manage users and groups, and lock everything down with SELinux mandatory access control. Plus, get access to 25 PDF "cheat sheets" and 100 practice questions so you can solidify and test your knowledge.
- Installing Linux on a physical machine
- Managing systemd services
- Managing reoccurring jobs with cron
- Limiting system access
- Configuring networking
- Creating, editing, and moving files and directories
- Analyzing text with grep and regular expressions
- Installing software and packages
- Managing the kernel
- Managing users, accounts, and groups
- Setting permissions
- Using access control lists
- Securing Linux with SELinux
- Accessing Linux remotely
- Configuring local storage
Skill Level Intermediate
Duration
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Introduction
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Welcome57s
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What you should know3m 45s
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About Red Hat Certifications2m 52s
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1. Deploy Systems
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Managing virtual machines6m 42s
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2. System Config and Services
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Get systemd service status3m 56s
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Manage systemd services2m 33s
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Configure networking3m 52s
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Manage one-time jobs with at4m 16s
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3. Essential Tools
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Archive files using tar4m 40s
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Compress files and archives4m 14s
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Create files and directories5m 18s
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Copy files and directories5m 48s
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Move files and directories4m 59s
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Create hard and soft links4m 55s
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Introduction to vim3m 33s
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Editing text with vim2m 45s
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Reading the system journal3m 26s
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4. Manage System Software
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Query with RPM7m 14s
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RPM query formatting6m 5s
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Overview of yum2m 20s
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Get info on package groups5m 15s
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Search for packages1m 47s
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Install and remove packages6m 59s
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Manage OS updates6m 48s
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Update the kernel4m 29s
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Manage kernel modules5m 18s
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5. Users and Accounts
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Modify local user accounts4m 57s
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6. File Access Control
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File and directory modes1m 19s
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Read access control lists3m 36s
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Set access control lists5m 49s
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Delete access control Lists4m 15s
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7. Manage Security
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Manage firewalls3m 15s
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8. Accessing Linux Remotely
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Configure Secure Shell2m 36s
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9. Configure Local Storage
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Conclusion
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Next steps1m 20s
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Video: Manage LVM volumes and volume groups