
女友從吉隆坡奔喪回來,關於婆婆喪禮,有趣事一則。
話說女友家是大家庭,兒孫滿堂,家人又喜歡在婆婆家打躉,幾乎每個周末在家中舉行的婆婆飯局,閒閒地兩三圍簡直粹料,於是乎,周末時到街市買菜,婆婆成為了大客仔
To follow up the first installment , it turns outthat enabling the source repositories has a side effect that I didn'tthink about at the time: it no longer looks in the default repositories.
(This is a general thing in yumdownloader : any time you specify arepository explicitly, it disables all the default ones. This makesme grumpy. While you can argue that this makes a sort of sense, itis not how yum itself behaves when you enable repositories, and yumdownloader uses the exact same command line
Now that we know how NFS is unreliable , we cansee what can go wrong when you attempt to do file-based locking over NFS. There are two failures, corresponding tothe two ways for things to go wrong when a reply is lost:
(This

女友從吉隆坡奔喪回來,關於婆婆喪禮,有趣事一則。
話說女友家是大家庭,兒孫滿堂,家人又喜歡在婆婆家打躉,幾乎每個周末在家中舉行的婆婆飯局,閒閒地兩三圍簡直粹料,於是乎,周末時到街市買菜,婆婆成為了大客仔
If you try to run a command with too many command line arguments, youget an 'Argument list too long' error (technically you get an E2BIG error from the kernel, which is then mapped into this error string byyour shell). There's a bunch of workarounds for this problem, such asusing xargs .
However, the error message is actually somewhat misleading. As oldUnix hands know (and new ones generally don't), the kernel's sizelimit on exec(