???? md5sum ???? debian ?? DVD iso ??????
?? time ????????????????????????
time md5sum *.iso
9f40fb950e3786e925cf1252cfdc012d debian-31r0a-source-1.iso
9241f8ebb1c6fe68481fa9057625cc5e debian-31r0a-source-2.iso
d46a107797aff6ea70133e515d1ad968 debian-31r0a-source-3.iso
real 3m46.722s
user 0m47.575s
sys 0m7.042s
????????user ?? sys ?????????????????? real ????????
???????? 2 ????????????????????????????man time ????????????????????????
??????
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??????(Faris Xiao)
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