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ddコマンドの完了状況、コピー速度を知りたい

Linux
More than 5 years have passed since last update.
root:# dd if=/dev/sdf of=/dev/null

バックグラウンドに回す(ctrl+Z -> bg) などして、USR1シグナルを送ればいい。

root:# killall -USR1 dd
791338977+0 records in
791338976+0 records out
405165555712 bytes (405 GB) copied, 5084.63 s, 79.7 MB/s
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