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How to show certain column of a record using SED?
NOTE: In the last expression, you can specify what separates the name from the designation by putting something else between the final set of / / in ‘N;s/ / /’ Not sed, but awk is quite a natural tool for this if it is acceptable: Alternatively, if your data was stored in a file named data.txt:
When to use sed to replace a column?
Last edited by evelibertine; 02-07-2012 at 01:24 PM.. Reason: to make it more accurate
What does SED do on the command line?
sed is a stream editor that works on piped input or files of text. It doesn’t have an interactive text editor interface, however. Rather, you provide instructions for it to follow as it works through the text. This all works in Bash and other command-line shells. With sed you can do all of the following: Select text.
Are there specific column spacing in awk-sed?
If you are looking for a more specific spacing between each column, you will have to forgo the printf loop and assign individual spacing to each field. If you are looking for a very quick sed alternative, you can always just do:
How to display specific lines in a file?
Use SED to display specific lines The powerful sed command provides several ways of printing specific lines. For example, to display the 10th line, you can use sed in the following manner: sed -n ’10p’ file.txt
How to read the output of SED in Bash?
Doing this with sed requires some additional shell trickery. Assuming bash, you could use Where < (sed ‘16,80!d’ file1) is substituted with the name of a pipe from which the output of sed ‘16,80!d’ file1 can be read.
How does the head command get the lines of a file?
Explanation: You probably already know that the head command gets the lines of a file from the start while the tail command gets the lines from the end. The “head -x” part of the command will get the first x lines of the files. It will then redirect this output to the tail command.
https://www.youtube.com/watch?v=QVbiyvECGZ8