I wrote an answer in Ask Ubuntu to deal with this issue.
Unsorted output
$ lsblk | egrep -v ^loop
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
nvme0n1 259:0 0 477G 0 disk
├─nvme0n1p9 259:9 0 7.9G 0 part [SWAP]
├─nvme0n1p7 259:7 0 23.1G 0 part /mnt/old
├─nvme0n1p5 259:5 0 859M 0 part
├─nvme0n1p3 259:3 0 16M 0 part
├─nvme0n1p1 259:1 0 450M 0 part
├─nvme0n1p8 259:8 0 9G 0 part /mnt/e
├─nvme0n1p10 259:10 0 27.2G 0 part /mnt/clone
├─nvme0n1p6 259:6 0 45.1G 0 part /
├─nvme0n1p4 259:4 0 363.2G 0 part /mnt/c
└─nvme0n1p2 259:2 0 99M 0 part /boot/efi
mmcblk0 179:0 0 119.1G 0 disk
└─mmcblk0p1 179:1 0 119.1G 0 part /media/rick/SANDISK128
sr0 11:0 1 1024M 0 rom
sda 8:0 0 931.5G 0 disk
├─sda4 8:4 0 450M 0 part
├─sda2 8:2 0 128M 0 part
├─sda5 8:5 0 11.4G 0 part
├─sda3 8:3 0 919G 0 part /mnt/d
└─sda1 8:1 0 500M 0 part
Sorted output
$ lsblk | egrep -v ^loop | sblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
nvme0n1 259:0 0 477G 0 disk
├─nvme0n1p1 259:1 0 450M 0 part
├─nvme0n1p2 259:2 0 99M 0 part /boot/efi
├─nvme0n1p3 259:3 0 16M 0 part
├─nvme0n1p4 259:4 0 363.2G 0 part /mnt/c
├─nvme0n1p5 259:5 0 859M 0 part
├─nvme0n1p6 259:6 0 45.1G 0 part /
├─nvme0n1p7 259:7 0 23.1G 0 part /mnt/old
├─nvme0n1p8 259:8 0 9G 0 part /mnt/e
├─nvme0n1p9 259:9 0 7.9G 0 part [SWAP]
└─nvme0n1p10 259:10 0 27.2G 0 part /mnt/clone
mmcblk0 179:0 0 119.1G 0 disk
└─mmcblk0p1 179:1 0 119.1G 0 part /media/rick/SANDISK128
sr0 11:0 1 1024M 0 rom
sda 8:0 0 931.5G 0 disk
├─sda1 8:1 0 500M 0 part
├─sda2 8:2 0 128M 0 part
├─sda3 8:3 0 919G 0 part /mnt/d
├─sda4 8:4 0 450M 0 part
└─sda5 8:5 0 11.4G 0 part
Bash script
Here is the bash script to sort lsblk output.
#!/bin/bash
# Ask Ubuntu: https://askubuntu.com/questions/1392560/how-to-change-lsblk-sort-order
oIFS="$IFS" # Save IFS
IFS='|' # Use "|" as array delimiter
declare -a partiions=() # Partitions array for a given drive
add_part () {
line="$1" # Confusing parameter $1 becomes obvious
part=${line%% *} # get partition name, then get number
key=$(echo "$part" | grep -Eo '[0-9]+$')
# If length of number is less than 2, prepend "0"
if [[ "${#key}" < 2 ]]; then
key="0$key" # Prepend "0" to single digit
fi
line="${line:2}" # Strip out tree character
partitions+=( "$key$line" ) # Old line "├─..." now array entry "99..."
}
sort_parts () {
# Sort partitions array with sort key into new "sorted" array
read -r -d '' -a sorted < <(
echo "${partitions[*]}" | tr "|" "\n" | sort | tr "\n" "|" )
last_i=$(( ${#sorted[@]} - 1 )) # Last 0-based index in sorted array
for ((i=0; i <= $last_i; i++)); do
line="${sorted[i]}" # Get array line at 0-based index
line="${line:2}" # Strip out sort key "99"
if [[ $i -lt $last_i ]]; then
echo "├─$line" # Print a line that is not the last line
else
echo "└─$line" # Print last line
fi
done
partitions=() # Empty partitions array for the next drive
}
# Main Loop
while read line
do
first="${line:0:2}"
if [[ "$first" == "├─" || "$first" == "└─" ]]; then
add_part "$line" # Add special line to partitions array
if [[ "$first" == "└─" ]]; then
sort_parts # Last partition. Sort and print array
fi
else
echo "$line" # Simply print a regular line
fi
done < "${1:-/dev/stdin}" # Read from file $1 or from standard input
IFS="$oIFS" # Restore old IFS
Remember to put the script into your path and make it executable with:
chmod a+x /path/to/script
