Sed Using Declared Variable

 

Here is a small tip to use declared variables with sed command, since there is difference between using variable in other shell commands and sed I have been written this post.

In most of shell commands we use declared variables with $varaiable_name but with you need to use it as ${variable_name}

Example:

First declare a variable as

$ var1=a
$ var2=st

Now use the variable var1 and var2 in sed expression as shown below

$ echo "abc" | sed "s/${var1}/${var2}/g"

The above expression will replace all var1 with var2 and the output we get after running the above command is

stbc

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One comment on “Sed Using Declared Variable

  1. Pingback: Useing bash variable with awk | Sany's Linux and Open Source Blog

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