mjhjmtu

I'm using the following command to return a list of available disks and whether they're ssd or rotational (basically replacing 0 and 1 in lsblk's output with their actual meaning):

lsblk -d -o name,ro | sed "s/RO/ TYPE/; s/NAME/DISK/; s/0/SSD/g; s/1/ROT/g"

sample output:

DISK TYPE
sda SSD
sdb ROT

Now I'd like to add another column, "rm", to lsblk (lsblk -d -o name,ro,rm) but it also uses 0 and 1 to mean a different thing (0=fixed disk, 1=removable).

Is there a way to use sed (or awk or anything else) to replace 0 and 1's in the third column with YES and NO?

Awk approach:

lsblk -d -o name,ro,rm 
| awk 'NR == 1 print "DISK TYPE REMOVABLE"; split("SSD ROT", ro); split("NO YES", rm); next
 print $1, ro[$2+1], rm[$3+1] '

Sample output:

DISK TYPE REMOVABLE
sda SSD NO
sr0 SSD YES

try

lsblk -d -o name,ro,rm |
 awk '$2 == 0 $2 = "SSD" ; $2 == 1 $2 = "ROT" ; 
 $3 == 0 $3 = "NO" ; $3 == 1 $3 = "YES" ;
 print ; '

• this can be one-lined.


• sometime people use 1 instead of print ; .


• changing RO to TYPE is left as an exercice.