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[GH-ISSUE #1277] Permission denied for ultimate boot cd #1918

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opened 2026-03-01 18:37:19 +03:00 by kerem · 9 comments

kerem commented

2026-03-01 18:37:19 +03:00

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Originally created by @Darks1de42 on GitHub (Aug 5, 2023).
Original GitHub issue: https://github.com/netbootxyz/netboot.xyz/issues/1277

Describe the bug
UBCD Fails booting with the permission denied error.

To Reproduce
Steps to reproduce the behavior:

Boot Ultimate Boot CD.

Expected behavior
Ultimate Boot CD is booting and starting.

Screenshots

Originally created by @Darks1de42 on GitHub (Aug 5, 2023). Original GitHub issue: https://github.com/netbootxyz/netboot.xyz/issues/1277 **Describe the bug** UBCD Fails booting with the permission denied error. **To Reproduce** Steps to reproduce the behavior: 1. Boot Ultimate Boot CD. **Expected behavior** Ultimate Boot CD is booting and starting. **Screenshots** ![VirtualBox_netboot_05_08_2023_12_56_37](https://github.com/netbootxyz/netboot.xyz/assets/48830356/eab0b3ba-a6c6-42df-afc4-ca57646e36f0)

kerem

2026-03-01 18:37:19 +03:00

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kerem commented

2026-03-01 18:37:20 +03:00

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@matchuek commented on GitHub (Sep 19, 2023):

this may be a clue:

          GIve it a try now, the iPXE root ca cross signing cert had expired and is now fixed.

Originally posted by @antonym in https://github.com/netbootxyz/netboot.xyz/issues/86#issuecomment-190383312

@matchuek commented on GitHub (Sep 19, 2023): this may be a clue: GIve it a try now, the iPXE root ca cross signing cert had expired and is now fixed. _Originally posted by @antonym in https://github.com/netbootxyz/netboot.xyz/issues/86#issuecomment-190383312_

kerem commented

2026-03-01 18:37:20 +03:00

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@Thomas-Busch-Waterloo commented on GitHub (Nov 14, 2023):

I can confirm this is still an issue,

@Thomas-Busch-Waterloo commented on GitHub (Nov 14, 2023): I can confirm this is still an issue, ![image](https://github.com/netbootxyz/netboot.xyz/assets/19546812/dbd09061-ba08-4b21-803e-b85831db579f)

kerem commented

2026-03-01 18:37:20 +03:00

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@shalak commented on GitHub (Jan 14, 2024):

I'm facing similar issue when using my local asset cache:

The cert on https:/netbootxyz.mydomain.net/ is valid, signed by Let's Encrypt

I entered the iPXE shell and run show unixtime (and converted it viadate --date=@$((0x65a43aa6))) to verify that the sytem time is correct - it is. Running curl https://netbootxyz-nginx.mydomain.net/ubuntu-squash/releases/download/22.04.3-7e94379b/vmlinuz downloads the vmlinuz file with no issues.

As this probably is a different issue, I've taken a liberty of creating a separate issue for it.

@shalak commented on GitHub (Jan 14, 2024): I'm facing similar issue when using my local asset cache: ![image](https://github.com/netbootxyz/netboot.xyz/assets/1536554/b0514d39-37c6-4d95-b868-aa9eca9a1bc6) The cert on `https:/netbootxyz.mydomain.net/` is valid, signed by Let's Encrypt I entered the iPXE shell and run `show unixtime` (and converted it via`date --date=@$((0x65a43aa6))`) to verify that the sytem time is correct - it is. Running `curl https://netbootxyz-nginx.mydomain.net/ubuntu-squash/releases/download/22.04.3-7e94379b/vmlinuz` downloads the vmlinuz file with no issues. As this probably is a different issue, I've taken a liberty of creating a [separate issue](https://github.com/netbootxyz/netboot.xyz/issues/1398) for it.

kerem commented

2026-03-01 18:37:20 +03:00

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@Furbynat0r1122 commented on GitHub (Feb 14, 2024):

Here is the fix:

Just Replace the Mirror in the utils-pcbios-64.ipxe menu:

:ubcd
set util_path http://pharry.org/data/ubcd539.iso
set util_file ubcd539.iso
set util_version 539
goto boot_memdisk

@Furbynat0r1122 commented on GitHub (Feb 14, 2024): Here is the fix: Just Replace the Mirror in the utils-pcbios-64.ipxe menu: :ubcd set util_path http://pharry.org/data/ubcd539.iso set util_file ubcd539.iso set util_version 539 goto boot_memdisk

kerem commented

2026-03-01 18:37:20 +03:00

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@antonym commented on GitHub (Feb 19, 2024):

Try the latest rolling build, I was able to load it right up, it should work better with Let's Encrypt Certs now.

https://twitter.com/ipxe/status/1758124717477593405

@antonym commented on GitHub (Feb 19, 2024): Try the latest rolling build, I was able to load it right up, it should work better with Let's Encrypt Certs now. https://twitter.com/ipxe/status/1758124717477593405

kerem commented

2026-03-01 18:37:20 +03:00

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@shalak commented on GitHub (Feb 21, 2024):

I'm struggling to find the rolling build docker image... I guess I'll have to wait until it's officially released 🤔

@shalak commented on GitHub (Feb 21, 2024): I'm struggling to find the rolling build docker image... I guess I'll have to wait until it's officially released 🤔

kerem commented

2026-03-01 18:37:21 +03:00

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@antonym commented on GitHub (Feb 21, 2024):

The latest from the netboot.xyz download page is always rolling.

@antonym commented on GitHub (Feb 21, 2024): The latest from the netboot.xyz download page is always rolling.

kerem commented

2026-03-01 18:37:21 +03:00

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@shalak commented on GitHub (Feb 21, 2024):

Hmm, the ghcr.io/netbootxyz/netbootxyz:latest runs netbootxyz v2.0.76 and does not work with Let's Encrypt certs

@shalak commented on GitHub (Feb 21, 2024): Hmm, the `ghcr.io/netbootxyz/netbootxyz:latest` runs netbootxyz `v2.0.76` and does not work with Let's Encrypt certs

kerem commented

2026-03-01 18:37:21 +03:00

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@pctripsesp commented on GitHub (Mar 12, 2024):

I downloaded the latest from https://netboot.xyz/docs/booting/usb and still same error

@pctripsesp commented on GitHub (Mar 12, 2024): I downloaded the latest from `https://netboot.xyz/docs/booting/usb` and still same error

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