Bug 1566088

Summary: Need to add daemon reload suggestion at fstab edit
Product: Red Hat Enterprise Linux 7 Reporter: John Pittman <jpittman>
Component: doc-Storage_Administration_GuideAssignee: Marek Suchánek <msuchane>
Status: CLOSED CURRENTRELEASE QA Contact: Zhang Kexin <kzhang>
Severity: medium Docs Contact:
Priority: high    
Version: 7.4CC: jpittman, kwalker, msekleta, msuchane, rhel-docs
Target Milestone: rcKeywords: Documentation
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Hardware: All   
OS: Linux   
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Last Closed: 2018-05-10 12:44:10 UTC Type: Bug
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Description John Pittman 2018-04-11 13:38:52 UTC
Document URL: 

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/storage_administration_guide/ch-swapspace

Section Number and Name: 

CHAPTER 15. SWAP SPACE

Describe the issue: 

When changing /etc/fstab online in a systemd environment, a 'systemctl daemon-reload' must be run.  After editing your /etc/fstab with the sed command, you'll need to run a 'systemctl daemon-reload'.  The fstab isn't read and the mount units generated until that is run.  Without that, you will have a mount unit created for the old swap LV that will attempt to mount whenever your trigger a udev change event.  

Suggestions for improvement: 

Maybe a hint at the end of the page.  "If editing /etc/fstab online, ie. with no reboot, then 'systemctl daemon-reload' should be run afterwards to update systemd daemon"