I am trying to delete x02 character from a file, I can easily delete x02 from a file using sed -i 's/\x2//g' command. Problem here is I don't want to delete x02 character which immediately starts with I. Except that I want to delete all other x02 characters.
Example:
File data:
I^A12^Agop^Bal^BI^A3^B^B4^Aramu^BI^A56^Asubbu^BI^A78^Asai^B
Expected output:
I^A12^Agopal^BI^A34^Aramu^BI^A56^Asubbu^BI^A78^Asai^B
You could explicitly match anything but I:
sed -i 's/\x02\([^I]\)/\1/g
This matches any pair of characters which are any character other than I preceded by \x02 and replaces it with the second character.
sed -e '
s/\(\x02\)\1\1*//g; # erase 2 or more consecutive STX chars
s/\x02\([^I]\)/\1/g; # erase the STX only if followed by a non-I char
' yourfile
Here I don't want to delete I in 3^BI^B4 as it does't have immediate I which contradicts with your assertion in the beginning that you want to delete /x02 which immediately starts with I` So it's not clear whether you are focussing on deleting I or deleting \x02.