Quick Answer: How do I show the first 100 lines in Unix?

How do I get the first 100 lines of a file 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 you display the top 5 lines in Unix?

head -15 /etc/passwd

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 number of lines in a file in Unix?

How to Count lines in a file in UNIX/Linux

1. The “wc -l” command when run on this file, outputs the line count along with the filename. $ wc -l file01.txt 5 file01.txt.
2. To omit the filename from the result, use: $ wc -l < file01.txt 5.
3. You can always provide the command output to the wc command using pipe. For example:

How do I get the first line in Linux?

To store the line itself, use the var=$(command) syntax. In this case, line=$(awk ‘NR==1 {print; exit}’ file) . With the equivalent line=$(sed -n ‘1p’ file) . will be marginally faster as read is a built-in bash command.

What is the command to display the first 10 lines of file in Linux?

The head command, as the name implies, print the top N number of data of the given input. By default, it prints the first 10 lines of the specified files. If more than one file name is provided then data from each file is preceded by its file name.

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.

How do I list the first 10 files in Linux?

The ls command even has options for that. To list files on as few lines as possible, you can use –format=comma to separate file names with commas as in this command: $ ls –format=comma 1, 10, 11, 12, 124, 13, 14, 15, 16pgs-landscape.

How do you print the first and last line in Unix?

sed -n ‘1p;$p’ file. txt will print 1st and last line of file. txt . After this, you’ll have an array ary with first field (i.e., with index 0 ) being the first line of file , and its last field being the last line of file .

How do you count unique lines in Unix?

How to show a count of the number of times a line occurred. To output the number of occurrences of a line use the -c option in conjunction with uniq . This prepends a number value to the output of each line.

How do you count lines with grep?

Using grep -c alone will count the number of lines that contain the matching word instead of the number of total matches. The -o option is what tells grep to output each match in a unique line and then wc -l tells wc to count the number of lines. This is how the total number of matching words is deduced.

How do I count the number of lines in a file?

Approach:

1. Create a variable to store the file path.
2. Use wc –lines command to count the number of lines.
3. Use wc –word command to count the number of words.
4. Print the both number of lines and the number of words using the echo command.