Visit Jeremy's Blog.
Go Back > Blogs > linux-related notes
User Name


Just annotations of little "how to's", so I know I can find how to do something I've already done when I need to do it again, in case I don't remember anymore, which is not unlikely. Hopefully they can be useful to others, but I can't guarantee that it will work, or that it won't even make things worse.

Bash quickie] Get a "random" number (larger than zero, within a range) with "shuf" only

Posted 07-31-2014 at 01:16 AM by the dsc (linux-related notes)
Updated 07-31-2014 at 01:39 AM by the dsc (deweirdifying the wording)

It always annoys me when I see things like "cat file | grep pattern | sed ..." when just "sed" would suffice, but I was guilty of using seq only to shuf random numbers when shuf can do it by itself.

shuf -n 1 -i 0-999999999

(apparently the largest number you can get is $((9999**8)) (9999^8 in bash-math), larger than that it gets negative, for some reason )

You also don't need to do some fancy "echo -e" with several...
Posted in Uncategorized
Views 304 Comments 0 the dsc is offline


All times are GMT -5. The time now is 05:54 PM.

Main Menu
Write for LQ is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration