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My goal is to extract text from a specific line with a hotword (don't know how to call it else) in it. The line number can vary because its an weekly updated file. When hotword is detected it should copy this line and all following text to another file.
Could this be done by sed, awk or something else?
grep -A 10 can be used to print the line with the matching word and ten lines after (you can substitute 10 with whatever number you want) but as you haven't indicated how many lines are in the file, you can use the following instead:
sed -n '/word/,$p' file >> file2
That will print the line with the word and all of the lines afterwords and then append them to another file. This way, you don't have to account for the total number of lines if the file contains a large number of lines such as 1,000 or more.
grep -A $(< $A wc -l) hotword $A >> $B
Another option is to use awk:
awk "/word/, 0" infile >outfile
This copies the range of lines starting from the first one containing ‘word’, and ending never (hence the 0).
