linux - Working with files in Expect -


i want read file contents, processing , write them file using expect scripting tool.

let's assume have file_a contains following data:

the ip address of machine is: "0.0.0.0"

i want read contents of file_a, modify them , write them file_b, should following:

the ip address of machine is: "192.168.0.69"

can please me this?

you can use sed command replace file content below.then use move command make backup file want.

sed -i.bk  's/0.0.0.0/192.168.0.69/g' file_a.txt mv file_a.txt.bk file_b.txt

explanation:

sed = stream editor -i = in-place (i.e. save original file) command string:

s = substitute command

0.0.0.0 = regular expression describing word replace (or word itself)

192.168.0.69 = text replace with

g = global (i.e. replace , not first occurred


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