Suppose that I have ten bash shell scripts:
script10.sh. Initially, all ten files are identical.
Now, I would like to make two changes in each script:
In each file, I would like to change a particular line (say line 8) -- that is, deleting whatever is on line 8 and replacing it with a "constant" string that I specify, such as
"This is line 8."This is similar to this question, but there they wanted to replace
"BBB", whereas I would like to replace line 8 (whatever it is) with
"This is line 8.".
In each file, I would like to change another particular line (say line 21) and replace it with a "variable" string that I specify. For example, in
script1.shI want to change line 21 to
script2.shI want to change line 21 to
"PQR"; and in
script3.shI want to change line 21 to
"ABC". Essentially this is just many calls to the function in (1) above -- except that I would be making the change in one individual file rather than in all files, and that I am specifying ten different strings rather than just one. So to obtain (2) here, perhaps I would just call (1) ten different times with different parameters.
I am interested in solutions that use commonly available Linux programs like