How do I print a 5th line in Unix?

How do I print a 5th line in Unix?

Below are three great ways to get the nth line of a file in Linux.

1. head / tail. Simply using the combination of the head and tail commands is probably the easiest approach.
2. sed. There are a couple of nice ways to do this with sed .
3. awk. awk has a built in variable NR that keeps track of file/stream row numbers.

How comment multiple lines sed?

3 Answers

1. /^\s*log.*;$/ s|^|//| If the line starts with log and ends with ; then substitute the start, ^ with //
2. /\s*^log/, /);$/ s|^|//|” /^log/, /);$/ This is an address range. For all lines within this range, the substitution is performed. The range of lines start from the first regex match to the end match.

How do you print top 100 lines in Unix?

Type the following head command to display first 10 lines of a file named “bar.txt”:

1. head -10 bar.txt.
2. head -20 bar.txt.
3. sed -n 1,10p /etc/group.
4. sed -n 1,20p /etc/group.
5. awk ‘FNR <= 10’ /etc/passwd.
6. awk ‘FNR <= 20’ /etc/passwd.
7. perl -ne’1..10 and print’ /etc/passwd.
8. perl -ne’1..20 and print’ /etc/passwd.

How to print particular line number by using sed command?

Method 1 : By using ‘d’ command i.e for delete. Method 2 : By using ‘p’ command i.e for print. SED : Using ‘d’ command for printing particular line number. Here we will use the regex ‘d’ with sed command, its meaning is delete. Now from above content, we will print the line number 4 by using below given command.

Which is the second line of a sed command?

In this example print second line: The ‘p’ command is preceded by a ‘2’. The number ‘2’ refers to line number two. You can tell sed to perform prints only on a particular line or lines. In this example print 1 to 5 lines:

How does sed pattern format 3 work in Excel?

Sed Pattern Format 3: ADDRESS,/PATTERN/. It prints from the Nth line of the input, to the line which matches the pattern. If the pattern doesnt match, it prints upto end of the input. For example, 4th line matches the pattern “Security”, so it prints from 3rd line to 4th line.

How to delete matching lines in sed command?

Delete matching lines ‘d’ option is used in `sed` command to delete any line from the file. Create a file named os.txt and add the following content to test the function of ‘d’ option. cat os.txt The following `sed` command will delete those lines from os.txt file that contains the text, ‘OS’.

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