Comment 13 for bug 1930934

Just installed zsh, then installed Cubic, and tested...

    $ sudo apt install zsh
    $ chsh -s `which zsh`
    $ sudo reboot

No issues encountered...

Create disk image
• The progress tracker................... Started
• The progress tracker id is............. 140379615528512
• The process started at................. 17:42:12.090574
• Execute asynchronously................. xorriso -as mkisofs -r -J -joliet-
                                        long -l -iso-level 3 -V 'Kubuntu
                                        21.04.0 2021.06.08 amd64'
                                        --grub2-mbr --interval:local_fs:0s-1
                                        5s:zero_mbrpt,zero_gpt:'/home/tstusr
                                        /Ubuntu/partition-1.img'
                                        --protective-msdos-label
                                        -partition_cyl_align off
                                        -partition_offset 16 --mbr-force-
                                        bootable -append_partition 2
• Completed.............................. 0%
                                        28732ac11ff8d211ba4b00a0c93ec93b --i
                                        nterval:local_fs:0d-10039d::'/home/t
                                        stusr/Ubuntu/partition-2.img'
                                        -appended_part_as_gpt
                                        -iso_mbr_part_type
                                        a2a0d0ebe5b9334487c068b6b72699c7 -c
                                        '/boot.catalog' -b
                                        '/boot/grub/i386-pc/eltorito.img'
                                        -no-emul-boot -boot-load-size 4
                                        -boot-info-table --grub2-boot-info
                                        -eltorito-alt-boot -e '--
                                        interval:appended_partition_2:all::'
                                        -no-emul-boot -boot-load-size 10040
                                        -isohybrid-gpt-basdat -o "/home/tst
                                        usr/Ubuntu/kubuntu-21.04.0-2021.06.0
                                        8-desktop-amd64.iso" .
• The process id is...................... 9235
• Completed.............................. 10%
• Completed.............................. 20%
• Completed.............................. 30%
• Completed.............................. 40%
• Completed.............................. 50%
• Completed.............................. 60%
• Completed.............................. 70%
• Completed.............................. 80%
• Adjust the final percent............... from 97.09% to 100.00%
• Completed.............................. 90%
• Completed.............................. 100%
• The progress tracker................... Stopped
• The process finished at................ 17:42:48.258216
• The exit status, signal status is...... 0, None
• The message is......................... done ISO image produced: 1796409
                                        sectors Written to medium : 1796409
                                        sectors at LBA 0 Writing to 'stdio:/
                                        home/tstusr/Ubuntu/kubuntu-21.04.0-2
                                        021.06.08-desktop-amd64.iso'
                                        completed successfully.