perl -e '$0="";$r=`uname -a`;$r=~s/(?<=\.)\d+(?!\.|\d)/${$z=$&==0?$&+1
+:$&-1}$z/g;print $r;'

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this will decrease with 1 unless it's 0 (then it increments)

dmql++

In reply to show increased/decreased os version (foolish but funny) by dmql

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