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How to insert a line before or after a pattern?
On finding the pattern ‘Fedora’, the requirement is to insert a line: after the pattern. 1. awk solution. The ‘1’ at the end prints every line by default. On finding the pattern ‘Fedora’, ‘Cygwin’ is printed. Hence, first “Cygwin” gets printed followed by ‘Fedora’ (1). 2. sed solution which is simple.
Is there a way to add text to the last line of a file?
That will add the text >end> to the last line (without newlines) of the file. Of course, in this case (as in your example also) it needs that the file contains at least one line (not empty). Using double quotes (as in the selected answer) is not a good idea as then the shell will try to process each $ in the string.
How to insert two lines at end of file?
Use sed ‘append (a)’ command. For example, to append two lines at the end of file: In a simple way to write and make the changes in the contents at a specific line in a file . If you want to insert anything at a specific line number then below command can be used: where 2i – line number 2 and i stands for inserting .
How to print the first line of a pattern in Perl?
Hence, first “Cygwin” gets printed followed by ‘Fedora’ (1). 2. sed solution which is simple. On finding the pattern ‘Fedora’, substitute with ‘Cygwin’ followed by the pattern matched. 3. Perl solution: The ‘p’ option is the alternative for the ‘1’ in awk, prints every line by default.
How to insert a file into another file?
To insert it only before the first matching line you could use a l oop and just pull in the n ext line until you get to end of file: With these sed solutions you lose the ability to edit in-place (but you can redirect to another file). Use a loop to read the lines in file2. If you find a line starting with Pointer, then print out file1.
How to print the inner file after a pointer?
To make the inner file print after the Pointer line, just switch the order of the patterns (you need to add a semicolon to get the default action), and you can drop the line variable: -r file1 reads in the specified file to after the addressed line, which in this case is the line previous to the first line matching Pointer.