SKU: 2568698489

Classic Shell Scripting: Hidden Commands That Unlock the Power of Unix

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Classic Shell Scripting: Hidden Commands That Unlock the Power of UnixShell scripting skills never go out of style. It's the shell that unlocks the real potential of Unix. Shell scripting is essential for Unix users and system administrators a way to quickly harness and customize the full power of any Unix system. With shell scripts, you can combine the fundamental Unix text and file processing commands to crunch data and automate repetitive tasks. But beneath this simple promise lies a treacherous ocean of variations

Shell scripting skills never go out of style. It's the shell that unlocks the real potential of Unix. Shell scripting is essential for Unix users and system administrators-a way to quickly harness and customize the full power of any Unix system. With shell scripts, you can combine the fundamental Unix text and file processing commands to crunch data and automate repetitive tasks. But beneath this simple promise lies a treacherous ocean of variations in Unix commands and standards. Classic Shell Scripting is written to help you reliably navigate these tricky waters.Writing shell scripts requires more than just a knowledge of the shell language, it also requires familiarity with the individual Unix programs: why each one is there, how to use them by themselves, and in combination with the other programs. The authors are intimately familiar with the tips and tricks that can be used to create excellent scripts, as well as the traps that can make your best effort a bad shell script. With Classic Shell Scripting you'll avoid hours of wasted effort. You'll learn not only write useful shell scripts, but how to do it properly and portably.The ability to program and customize the shell quickly, reliably, and portably to get the best out of any individual system is an important skill for anyone operating and maintaining Unix or Linux systems. Classic Shell Scripting gives you everything you need to master these essential skills.



Binding Type: Paperback
Publisher: O'Reilly Media
Published: 05/01/2005
ISBN: 9780596005955
Pages: 534
Weight: 1.94lbs
Size: 9.10h x 7.00w x 1.10d
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SKU: 2568698489

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Stephen W. Elliott
San Leandro, US
★★★★★ 5
Runs like a Rolex
Color: 5535-ZP-blue
What a watch!! A very nice watch. Everyone asks if it is a Rolex!! I say NO but it keeps me on time like a Timex. The band is wearing a little quickly but otherwise thumbs up!
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Reviewed in the United States on December 4, 2025
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Hyperion Grey Solomon
Battle Creek, US
★★★★★ 1
Most important review for this watch and company.
Color: 5566-ZP-blue face, Color: 5566-ZP-blue face
I bought two and they both broke. Customer service has ignored my e-mail. What more do you need to know about a company? I personally wrote them through their own website, so they could keep Amazon out of it. It makes me angry that they won't even reply to my e-mail. I was nice. Both watches broke, neither one if actually water proof. The band is exceptionally thin and it WILL break on you once it arrives. It's so poor, that my body moisture is what got into the face of the watch. What the heck? I've had better 9 dollar watches from Walmart. Zero out of zero for the COMPANY who doesn't care about their customers, and zero out of ten for watch quality. Useless. I wasted 60-80 bucks on two of these! BOTH BROKE! and in more than one way!!!!! Terribly marked up (this is less than a 10 dollar Walmart watch - quality is LOWER than the lowest 3 dollar watches off Temu, Shien, Walmart), customer service is non-existent, and the band WILL BREAK on you. It's worthless. Take your money somewhere else. Attached pictures show the moisture leak from my sweat, but in real life, it's actually much worse. Worthless, not usable. Two of them folks. TWO!
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Reviewed in the United States on May 2, 2026
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sheila
Natrona Heights, US
★★★★★ 5
Quality Watch
Color: 5566-ZP-white face
A very nice looking inexpensive watch for work if you are in a job that you don't want to wear an expensive watch.
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Reviewed in the United States on January 15, 2026
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John Schmidt
West Palm Beach, US
★★★★★ 4
As Advertised
Color: 5535-HP-white
The watch is what I expected, and works upon receipt as advertised. At this price, if it only works for 4-6 months it's easily worth the money. Large, nice looking face, day/date. Wristband is what you'd expect, but adequate and comfortable.
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Reviewed in the United States on December 25, 2023
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David E
Lowell, US
★★★★★ 3
Dies after a Year
Color: 5566-ZP-white face
Watch worked fine for about a year, then just stopped working - just like that. No amount of shaking or gentle impacts would get it to start ticking again. I'd also say my biggist issue with it was it was always difficult to tell which hand was the second hand and which hand was the minute hand since they're both the same color and thickness. Wish the hour and minute hands were a little thicker so they'd stand out a little better and/or that the minute hand was a different color so it was offset. Resulted in having to study the watch to get the time instead of a quick glimpse to see what time it was. Irritating after a while.
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Reviewed in the United States on February 15, 2026

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