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07-01-2009
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how to expand environment variables in a file?
I am new to unix and would appreciate if someone could help.
I have an environment variable SourceFilePath=/db1/Src/test set on the unix server. I want to expand this SHELL variable in a file using any command sed, awk etc File contents is as follows: var=$SourceFilePath/file.txt The command should create a new file by subsituting the environment variable with the actual value. The output should look like this. var=/db1/Src/test/file.txt |
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07-01-2009
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I think you mean to 'get the value of' a variable or maybe dereference it.
Do you mean you want to create a file using a variable as a filename? Code:
SourceFilePath=/db1/Src/test
var=${SourceFilePath}/file.txt
> $var # this creates an empty file named /db1/Src/test/file.txt
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07-01-2009
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Hi Jim,
I want to substitute the value for ${SourceFilePath} and not create a file with the variable name. file.txt is already existing. My scenario is like this. file.txt is present on the TEST & DEV I want to use the environment variable to point either to TEST or DEV. So i will have one parameter file PATH=$SourceFilePath/file.txt I want to write a script which will generate a new file for the following system TEST server should create a new file abc.txt with the following content PATH=/db1/Src/test/file.txt DEV server should create a new file xyx.txt with the following content PATH=/db1/Src/dev/file.txt The command or script must only substitute the value for the environment variable. Thanks for your input. |
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