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mac command lines
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| mac 硬盘测速 | |
| time dd if=/dev/zero bs=1024k of=tstfile count=1024 | |
| time dd if=tstfile bs=1024k of=/dev/null count=1024 | |
| 显示：defaults write com.apple.finder AppleShowAllFiles -bool true | |
| 隐藏：defaults write com.apple.finder AppleShowAllFiles -bool false |
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