Why isn’t this awk command doing a full outer join?
Objective: Merge the contents of two files using common key present in the files
awk
How to add a new text line at the first line of a file?
File: TABLE1 1234 9555 87676 2344 Expected output: Description of the following table: TABLE1 1234 9555 87676 2344 Answers: Thank you for visiting the Q&A section on Magenaut. Please note that all the answers may not help you solve the issue immediately. So please treat them as advisements. If you found the post helpful (or … Read more
Are there 2 ways to set awk vars via command line?
I noticed an O’Reilly awk example (1997) which assigned an awk variable by setting it on the command line after the program-text. It does work, but I can’t find this syntax in man / info awk. Have I just missed it; is it depricated…? The only syntax I’ve seen in the manual is the -v option.
How can I convert timestamps in a column to a date?
I have a file containing this:
How can I get the page numbers only of a pattern in a pdf file, regardless if the pattern is multiline?
I find the page numbers of a multiline pattern in a pdf file, by How shall I grep a multi-line pattern in a pdf file and in a text file? and How can I search a string in a pdf file, and find the physical page number of each page where the string appears?
Replace line M in file1 with line N in file2
Let M=3 and N=4. I want to replace line M in file1 with line N in file2. I can replace with a string using sed:
Sum values in 5th column that correspond to same field in 2nd column
Considering below file:
How to print the longest line in a file?
I’m looking for the simplest method to print the longest line in a file. I did some googling and surprisingly couldn’t seem to find an answer. I frequently print the length of the longest line in a file, but I don’t know how to actually print the longest line. Can anyone provide a solution to print the longest line in a file? Thanks in advance.
Delete the nth line from a matched string (which only occurs once in the file)
I have a question related to deletion of strings that appear at the n+2 position after the matched string which is at position n using awk for multiple files. I am able to print it using the command:
Print range of columns comma-separated, and the rest without comma-separation
I’m trying to figure this out.