Shell Programming and Scripting

i have two files

file 1 containing :

Code:

aaa
bbb
ccc
.
.
.
zzz

file 2 containing

Code:

111
222
333
111
222
333
.
.
.

what i want in the end is this in file 3

Code:

111
222
aaa
111
222
bbb
333
111
222
ccc
.
.
.

i know i can do this with sed and i have done it for one string to be inserted after a particular pattern but i am able to do the action above
may be its possible with a loop but i have been trying for some time cant arrive

please help

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Not sure I get your criteria totally, from your expected output:

Code:

111 line 1 from file2
222 line 2 from file 2
aaa line 1 from file 1
111 line 4 from file2  ...   what happened to line 3 from file 2
222 line 5 from file2
bbb line 2 from file 1
333 line 6? from file2
111 line 7 from file2
222 line  8 from file 2
ccc line 3 from file 1

Do you just want to get two lines from file2, followed by one line from file 1 ?

Code:

cat file2 | paste - - file1| tr "\t" "\n"

Or is there more complex criteria ?

HTH

actually Tyatalus

i have file 1 containing different strings each in a differnt line and what i want to do is insert these strings before a particular pattern in file 2

eg file 1 may contain

AAA
BBB
and so on there are 201 entries exactly

now i want to insert AAA after pattern XXX in file 2 then BBB after the next occurence of pattern XXX and so on

ah. in that case I think you want:

Code:

#  nawk '/222/{print;getline < "file1"}{print}' file2

HTH