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版权声明
Original edition, entitled Linux Command Line and Shell Scripting Bible, 4th Edition, by Richard Blum, Christine Bresnahan, ISBN 978-1-119-70091-3, published by John Wiley & Sons, Inc.
Copyright © 2021 by John Wiley & Sons, Inc. All rights reserved. This translation published under License．
Simplified Chinese translation edition published by POSTS & TELECOM PRESS Copyright © 2022.
Copies of this book sold without a Wiley sticker on the cover are unauthorized and illegal.
本书简体中文版由John Wiley & Sons, Inc.授权人民邮电出版社有限公司独家出版。
本书封底贴有John Wiley & Sons, Inc.激光防伪标签，无标签者不得销售。
版权所有，侵权必究。