linux - Text manipulation with bash -

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i have bash variables defined in file:

var1=.... var2="some value" var3=.... ....

how can change value of variable , add 1 more variable in specific line? need in single shell script.

edit:

expected output is:

var1=.... var2="another value" var3=.... new_var=.... ....

i believe following code achieve results want, if understood question correctly:

#!/bin/bash  #change value of variable sed -i -e 's/^var2=.*$/var2="another-value"/gi' /folder/file  #add new variable variable declaration area, using 1 existing variable reference point sed -i -e '/^var2=/i \new_var="another-value"' /folder/file  exit 0

that substitute value of variable , add new variable list using 1 existing variable reference point insert new variable. code work in many bash versions.


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