How do I print the last line of a file in Unix?

Specifying -r causes tail to print lines from the end of the file in reverse order. The default for -r is to print the entire file this way. Specifying -f causes tail not to quit at the end of the file, but rather to reread the file repeatedly (useful for watching a “growing” file such as a log file).

What is the command to print the last line of a file?

1. The tail is the most common command used. tail command prints the last part of the files. -1 specifies to print one line from the last part.

How do you print a line from a file in Unix?

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.
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How do I see the end of a file in Linux?

The tail command is a core Linux utility used to view the end of text files. You can also use follow mode to see new lines as they’re added to a file in real time. tail is similar to the head utility, used for viewing the beginning of files.

How do I print the last line in awk?

Find out the last line of a file:

  1. Using sed (stream editor): sed -n ‘$p’ fileName.
  2. Using tail: tail -1 fileName.
  3. using awk: awk ‘END { print }’ fileName.

How do you use the tail command?

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 go to the last line in vi?

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 I go to a line of a file in Linux?

Using the head and tail commands, we can easily get the first and last parts of a file.

  1. First, we get line 1 to X using the head command: head -n X input.
  2. Then, we pipe the result from the first step to the tail command to get the last line: head -n X input | tail -1.
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How do you indicate start of file and end of file in Linux?

For example, you can use the echo command to append the text to the end of the file as shown. Alternatively, you can use the printf command (do not forget to use n character to add the next line). You can also use the cat command to concatenate text from one or more files and append it to another file.

How do I print a 5th line in Unix?

Sed Pattern Format 5: /PATTERN/,+N

It prints the lines which matches the pattern and next N lines following the matched line. For example, following prints the 5th line which matches the pattern /Storage/ and next two lines following /Storage/.

How do I print the last line of a file in Linux?

Specifying -r causes tail to print lines from the end of the file in reverse order. The default for -r is to print the entire file this way. Specifying -f causes tail not to quit at the end of the file, but rather to reread the file repeatedly (useful for watching a “growing” file such as a log file).

How do I see the last 20 lines of a file in Linux?

To display last 20 lines of a file linux use the tail command. Displays the last 20 lines. The default is 10 if you leave out the -n option.

What is end of file in Linux?

From Wikipedia, the free encyclopedia. In computing, end-of-file (EOF) is a condition in a computer operating system where no more data can be read from a data source. The data source is usually called a file or stream.

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How can I see the last line in awk?

You can get the number of lines in a file using “wc -l” | getline filesize in the begin block and use NR == filesize to test the last line in the script body.

How do you print the last line of a file in Python?

This is the last line.

  1. with open(“sample.txt”, “r”) as file:
  2. first_line = file. readline()
  3. for last_line in file:
  4. print(first_line)
  5. print(last_line)

How do I print the first line in awk?

The following `awk` command uses the ‘-F’ option and a conditional statement to print the author names after skipping the first line. Here, the NR value is used in the if condition. Here, “Author Name:nn” will be printed as the first line instead of the content from the first line.