I don't know if you can give a advise to teach me to study Shell Scripts .Thank you !
if you can tell a good web site about shell script learning ,I will be appriciation of you !

Here start with Bash scripting. There are like hundreds of howto's on the internet here's one:
http://www.tldp.org/LDP/abs/html/index.html

It's rather easy than High-Level Programming Languages.

1) save this code
#!/bin/bash
echo "Hello,Bash !"

2) type "chmod a+x " filename
3) run the filename
4)Just this simple

Shell scripts at their simplest are just a series of bash commands.
They need to have the #!/bin/bash line and be made executable as jackyopensrc mentions.
Try something simple like a script that mounts your floppy, lists the contents, then unmounts it. Next time you have 3 unlabeled floppies you can see what's on them with one command.
When you see how simple this is you just need some more ideas and a good reference.

Shellscripting is often about extracting information from files and taking actions based on this, or changing text streams, or taking actions based on wether a particular command was successful or not.
Therefore you'll find it well worth to learn commands like sed, awk and grep.
The more commands you know and can use, the easier shellscripting will become.
Don't forget to use the apropos command if you're not sure what command you're looking for...

Also learn how to create loops, if statements and functions.
Arrays can be useful too, but I rarely use them in my scripts so I would give them a lower priority...

zhanglinbao,

before you go on reading Advanced Bash Scripting Guide, like MooktaKiNG suggested, you may try to take an easy intro with
BASH programming HOWTO (http://www.ibiblio.org/pub/Linux/doc...tro-HOWTO.html or you can find it on your linux box), becouse abs advances quite fast and it could be a bit confusing for a newbie (well at least it was for me ).

Enjoy

Good day Everybody,

You can discover that Shell scripts can be very useful sometimes.

zhanglinbao,

May I ask you some kind of questions,such as

1)What type of Documents you are refering...?
2)Which parts of it you found difficults?
3)Have you ever tried a simple program?

I think you'd better let us your situations.