Thread: Variable help

i creating 4 character variable with:

od -an -n2 -x /dev/random

how can put colon in middle command?
e.g have 7a6f , want be: 7a:6f. how can achieve this?

code:

od -an -n2 -x /dev/random|sed s/\ ../\&:/

the first character output of od command space on debian (ie output " 1234") if ubuntu different (ie output "1234") use

code:

od -an -n2 -x /dev/random|sed s/../\&:/

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