It’s possible that there are processes left over from previous install. Let’s check:
/home/jk/yugabyte-data/node-1/disk-1/master.out & /home/jk/yugabyte-data/node-1/disk-1/master.err
files, and similarly, these files:
/home/jk/yugabyte-data/node-1/disk-1/tserver.out /home/jk/yugabyte-data/node-1/disk-1/tserver.err
to see why those processes didn’t start.