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How do I go to a specific line in bash?

How do I go to a specific line in bash?

Write a bash script to print a particular line from a file

  1. awk : $>awk ‘{if(NR==LINE_NUMBER) print $0}’ file.txt.
  2. sed : $>sed -n LINE_NUMBERp file.txt.
  3. head : $>head -n LINE_NUMBER file.txt | tail -n + LINE_NUMBER Here LINE_NUMBER is, which line number you want to print. Examples: Print a line from single file.

How do you tail a specific line?

Specify Specific Line

  1. grep -m 1 -n ”
  2. $ grep -m 1 -n ‘2019-04-09’ fail2ban.log 37371:2019-04-09 00:12:51,750 fail2ban.filter [20293]: WARNING Determined IP using DNS Lookup: mail.btce.com = [‘139.59.173.161’]
  3. tail –lines=+ tail -n +

How do I Cat few 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 do I put lines between numbers in a cat?

There are two command line options available in the cat command that allows you to display line numbers, –number (-n) and –number-nonblank (-b), according to your requirement. The option -n or –number will print out the line numbers of all lines, including the blank or empty lines in the file.

How do I go to a line of a file in Linux?

To do this, press Esc , type the line number, and then press Shift-g . If you press Esc and then Shift-g without specifying a line number, it will take you to the last line in the file.

How do you read a specific line of a file in Linux?

How to Display Specific Lines of a File in Linux Command Line

  1. Display specific lines using head and tail commands. Print a single specific line. Print specific range of lines.
  2. Use SED to display specific lines.
  3. Use AWK to print specific lines from a file.

How do you display the nth line of a file 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 do I see the tail of a file in Linux?

How to Use the Tail Command

  1. Enter the tail command, followed by the file you’d like to view: tail /var/log/auth.log.
  2. To change the number of lines displayed, use the -n option: tail -n 50 /var/log/auth.log.
  3. To show a real-time, streaming output of a changing file, use the -f or –follow options: tail -f /var/log/auth.log.

How do you show lines in Linux?

Press the Esc key if you are currently in insert or append mode. Press : (the colon). The cursor should reappear at the lower left corner of the screen next to a : prompt. A column of sequential line numbers will then appear at the left side of the screen.

How do cats last 10 lines?

To look at the last few lines of a file, use the tail command. tail works the same way as head: type tail and the filename to see the last 10 lines of that file, or type tail -number filename to see the last number lines of the file.

How do you show line numbers in Unix?

How can you display nth line of a file?

Is there a cat command to show all output lines?

You can use the cat command concatenate files and show on the screen under Linux or Unix like operating systems. The cat command also number all output lines starting with number one with the following syntax:

How can I use the cat command in Linux?

The cat command can add the contents of a file to the end of another file. Instead of using a single > sign, use a double >> sign: Open the test3 file by running: The content of test3 followed by test1 should display. Note: If you want to remove the sample files, take a look at how to remove files and directories using the Linux command line. 8.

How to read specific lines in a file in Bash?

One option would be to use sed to get the desired lines: Saying so would feed lines 1-20, 30-100 from the inputfile to read. @devnull’s sed command does the job. Another alternative is using awk since it avoids doing the read and you can do the processing in awk itself:

How to show the end of a line in cat?

You may find it useful to have line numbers in the output, especially for large files. To enable line numbering, add the –n option to the cat command: 12. Show the End of Line You can instruct cat to highlight the end of each line and spaces between lines with $.