Linux-下载/提取脚本

Question

I am looking to integrate a script with my control panel and am having issues as i am a novice scripter. What I would like to do is with 1 script download a file and extract it.

Example:

wget http://example.com/example.tar.gz

tar -xvzf example.tar.gz -C /

Do I need the following: #!/bin/bash at the start?

Any help would greatly help. Thank you.

Answer 1

Yupp, basically save this to myscript.sh

#!/bin/bash
wget -nv http://example.com/example.tar.gz
tar -zxvf example.tar.gz

then to execute it

./myscript.sh

More info about this here: http://www.linuxdoc.org/HOWTO/Bash-Prog-Intro-HOWTO.html

Answer 2

The #! at the beginning (called a shebang ) is used when your file is executed as a program. It tells the program loader what program to run the file with (/bin/bash in this case), so it is run using the command /bin/bash script_name.sh .

If the line is there, and the file has executable permissions, you can run it by double-clicking in the GUI or running path/to/script_name.sh in the shell.
Whether the line is there or not, you can always run it using bash path/to/script_name.sh

Answer 3

You could create a generic script to download and extract any .tar.gz file:

#!/bin/bash
wget -qO- $1 | tar zxv

then do ./myscript.sh http://example.com/example2.tar.gz