I have a file which is having following content: zdk aaa b12 cdn dke kdn Input1: aaa and cdn Output 1: aaa b12 cdn Input 2: zdk and dke Output 2: zdk aaa b12 cdn dke I could use below commands to achieve: grep -a aaa -A2 file # Output 1 grep -a aaa -A4 … Read more
Original file
When using sed to replace strings in-place, is there a way to make it report the changes it does (without relying on a diff of old and new files)?
I have the following data (a list of R packages parsed from a Rmarkdown file), that I want to turn into a list I can pass to R to install:
Question more or less says it all. I’m aware that /^$/d will remove all blank lines, but I can’t see how to say ‘replace two or more blank lines with a single blank line’
I’m looking for a way to only execute replacement when the last character is a newline, using sed.
I have input.txt tab-delimited text file around 30K lines, I would like to check each row (s1..s30K lines) for missing value (i.e blank space) and fill the missing value with zero value.See out.txt
I have a file named .ignore. In need to replace the projdir. For example:
I tried my luck with grep and sed but somehow I don’t manage to get it right.
I have a .csv file (on a mac) that has a bunch of empty lines, e.g.: