How do you display the first line of a text file in Unix?

How do I display a line from a text file in Linux?

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 I show a file line in Unix?

Print a single specific line

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. The tail command will display all the lines starting from line number x.

How do I read the first line of a file?

Another method to read the first line of a file is using the readline() function that reads one line from the stream. Notice that we use the rstrip() function to remove the newline character at the end of the line because readline() returns the line with a trailing newline.

How do you display the last line of a text file in Unix?

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. Try using tail to look at the last five lines of your .

How do I show the first line of a file in Linux?

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 display the 10th line of a file?

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.

What is NR in awk command?

NR is a AWK built-in variable and it denotes number of records being processed. Usage : NR can be used in action block represents number of line being processed and if it is used in END it can print number of lines totally processed. Example : Using NR to print line number in a file using AWK.

How do I read a text file in bash?

Reading File Content Using Script

1. #!/bin/bash.
2. file=’read_file.txt’
3. i=1.
4. while read line; do.
5. #Reading each line.
6. echo “Line No. $ i : $line”
7. i=$((i+1))
8. done < $file.

How do you read a single line of a text file in Python?

Python readline() method reads only one complete line from the file given. It appends a newline (“n”) at the end of the line. If you open the file in normal read mode, readline() will return you the string. If you open the file in binary mode, readline() will return you binary object.

How do you skip the first line in Python?

Call next(file) to skip the first line of the file.

1. a_file = open(“example_file.txt”)
2. next(a_file)
3. for line in a_file:
4. print(line. rstrip())
5. a_file.