zero tolerance: 防备松懈

Last Sunday, the sermon by Brother George Chu brought up an important revelation to me:
- the Broken Window Theory (see this link: https://en.wikipedia.org/wiki/Broken_windows_theory).

"The broken windows theory is a criminological theory that states that visible signs of crime, anti-social behavior, and civil disorder create an urban environment that encourages further crime and disorder, including serious crimes."

Apply to self management, or MOS - Managing One Self in general, and time management in particular, if I tolerate one slack in schedule, I will start a 松懈 path, a slippery slope.

So, for my next quarter, my focus ought to be: 
1. Zero tolerance of weekly goals
2. More importantly, zero tolerance of repentance in relating to my Father.

Migrate Ubuntu 18.04 to new SSD

Got a gift from Dell, a 1TB nvme SSD.

I took the opportunity to learn Linux admin, and migrate xps 13 from the current 256GB SSD to 1TB SSD.

Mostly based on https://askubuntu.com/questions/88384/how-can-i-repair-grub-how-to-get-ubuntu-back-after-installing-windows/88432#88432

1. "dump /dev/sda /mount/"Seagate Backup Disk"/my_file"
2. boot into live Ubuntu 18.04
3. "restore /mount/"Seagate Backup Disk"/my_file /my_mount
4. Mount other things: /my_mount/boot/efi, /dev, /usr, /dev

" for i in /sys /proc /run /dev; do sudo mount --bind "$i" "/my_mount$i"; done "
5. sudo chroot /my_mount
6. reinstall grub:
> grub-install /dev/nvme0n1p    # be careful not to use nvme0n1p3. 3 would not work

root@ubuntu:/# update-grub
Sourcing file `/etc/default/grub'
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-4.15.0-88-generic
Found initrd image: /boot/initrd.img-4.15.0-88-generic
Found linux image: /boot/vmlinuz-4.15.0-74-generic
Found initrd image: /boot/initrd.img-4.15.0-74-generic
Found linux image: /boot/vmlinuz-4.15.0-rc6-spectretee
Found initrd image: /boot/initrd.img-4.15.0-rc6-spectretee
Found linux image: /boot/vmlinuz-4.15.0-rc4-custom
Found initrd image: /boot/initrd.img-4.15.0-rc4-custom
Found Windows Boot Manager on /dev/nvme0n1p1@/EFI/Microsoft/Boot/bootmgfw.efi
Adding boot menu entry for EFI firmware configuration
done

7. Update fstab with new UUIDs

blkid | grep -i efi
grep -i efi /etc/fstab

If current EFI partition UUID (from blkid) differs from the one in /etc/fstab, update /etc/fstab with current UUID.

ubuntu@ubuntu:/boot/grub$ blkid | grep -i efi
/dev/nvme0n1p1: LABEL="ESP" UUID="7694-A0BD" TYPE="vfat" PARTLABEL="EFI system partition" PARTUUID="0bf7a902-bb97-42a5-bd40-b1f1d8e5277f"

root@ubuntu:/etc# cat fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
#              
# / was on /dev/nvme0n1p3 during installation
UUID=5cd800ce-94b9-479e-bdf0-4f43e35beb8c /               ext4    errors=remount-ro 0       1
# /boot/efi was on /dev/nvme0n1p1 during installation
UUID=E628-281B  /boot/efi       vfat    umask=0077      0       1
# swap was on /dev/nvme0n1p4 during installation
UUID=db7178b3-6c68-465f-8a77-85f19f256882 none            swap    sw              0       0
/dev/disk/by-id/usb-WD_My_Passport_0748_575843314137324630383933-0:0-part1 /mnt/usb-WD_My_Passport_0748_575843314137324630383933-0:0-part1 auto nosuid,nodev,nofail,noauto,x-gvfs-show 0 0

New /etc/fstab after fixing up:

# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
#              
# / was on /dev/nvme0n1p3 during installation
UUID=5cd800ce-94b9-479e-bdf0-4f43e35beb8c /               ext4    errors=remount-ro 0       1
# /boot/efi was on /dev/nvme0n1p1 during installation
UUID=7694-A0BD  /boot/efi       vfat    umask=0077      0       1
# swap was on /dev/nvme0n1p4 during installation
UUID=db7178b3-6c68-465f-8a77-85f19f256882 none            swap    sw              0       0
/dev/disk/by-id/usb-WD_My_Passport_0748_575843314137324630383933-0:0-part1 /mnt/usb-WD_My_Passport_0748_575843314137324630383933-0:0-part1 auto nosuid,nodev,nofail,noauto,x-gvfs-show 0 0











Finally, exit and reboot. 

Somehow UUID of /dev/nvme0n1p3 changed after reboot. It took  me an hour to debug that problem.

Overall, I was able to gain very good Linux Admin experience, while saving the time it takes to reinstall a fresh Linux. I think it is a net win.

Paul extols me Self Discipline

 Paul wrote, “For God did not give us a spirit of timidity [or fear], but a spirit of power, of love and of self-discipline” (2 Timothy 1:7 NIV