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/sbin/casper-stop already has (or has since had added) code to handle this situation if the file /run/casper-no-prompt exists. You can create a simple systemd unit file to always create this: mint@mint:~$ cat /etc/systemd/system/casper-no-prompt.service # see /sbin/casper-stop [Unit] Description=Casper no-prompt [Service] Type=oneshot ExecStart=touch /run/...


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Squashfs is often used in association with an union FS (overlayfs, aufs) to create immutable live images. Meaning that squashfs image is mounted readonly, and a tmpfs is mounted readwrite. We then assemble these two layers and mount them as an union on /. These assembly and mounting steps are usually done in initramfs before chrooting to the assembled root ...


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ISO hybrid images are crazy combinations of iso9660 format and multiple partition tables to make sure it boots everywhere. This is how the superblock looks: DEVICE OFFSET TYPE UUID LABEL sdb 0x8001 iso9660 2020-09-26-10-19-19-00 Debian 10.6.0 amd64 n sdb 0x1fe dos sdb 0x200 gpt ...


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Try to identify where the file grub.cfg is in the iso image (for me it is at boot/grub/). Remove the following two lines in the file: insmode play play 960 440 1 0 4 440 1 This is telling grub to play a tune of 440 Hz with a rest between it with a set tempo (refer to the grub manual for more detail). This is for booting from UEFI. Remove the system bell ^G ...


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