clfmerge(1) on Linux
The text bd318060a629, as Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze), Debian 5.0 (Lenny), Debian 4.0 (Etch), Debian 3.1 (Sarge), Debian 3.0 (Woody) shipped it.
merge Common-Log Format web logs based on time-stamps
Flags it lists
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-b -
-d