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

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

awk : $>awk ‘{if(NR==LINE_NUMBER) print $0}’ file.txt.
sed : $>sed -n LINE_NUMBERp file.txt.
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 print a few lines in Linux?

To look at the first few lines of a file, type head filename, where filename is the name of the file you want to look at, and then press . By default, head shows you the first 10 lines of a file. You can change this by typing head -number filename, where number is the number of lines you want to see.

How do I print a range of lines in Linux?

From the sed manual: p – Print out the pattern space (to the standard output). This command is usually only used in conjunction with the -n command-line option. n – If auto-print is not disabled, print the pattern space, then, regardless, replace the pattern space with the next line of input.

How do I print the first 10 lines of a file in Linux?

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

head -10 bar.txt.
head -20 bar.txt.
sed -n 1,10p /etc/group.
sed -n 1,20p /etc/group.
awk ‘FNR <= 10’ /etc/passwd.
awk ‘FNR <= 20’ /etc/passwd.
perl -ne’1..10 and print’ /etc/passwd.
perl -ne’1..20 and print’ /etc/passwd.

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

Thursday, May 24, 2012

The tail is the most common command used.
The END label in awk makes it even more easily.
In sed, $ indicates the last line, and $p tells to print(p) the last line($) only.
Another option in sed is to delete(d) all the lines other than(!) the last line($) which in turn prints only the last line.

How do you get a specific line from a file Linux?

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

First, we get line 1 to X using the head command: head -n X input.
Then, we pipe the result from the first step to the tail command to get the last line: head -n X input | tail -1.

How do you print a line range in Unix?

How do I extract a specific line from a file in Unix?

To extract a range of lines, say lines 2 to 4, you can execute either of the following:

$ sed -n 2,4p somefile. txt.
$ sed ‘2,4! d’ somefile. txt.

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 to print from a Linux?

Printing from the Linux command line Displaying printer settings. To view your printer settings from the command line, use the lpoptions command. Useful commands. To print a document on the default printer, just use the lp command followed by the name of the file you want to print. Two-sided printing. CUPS.

How do I view a file in Linux?

You can use any one of the following command to view a text file or any other files such as PDF, doc, image, video, music/mp3 and more. cat command. less command. more command. gnome-open command or xdg-open command (generic version) or kde-open command (kde version) – Linux gnome/ kde desktop command to open any file.

How do I search for files in Linux?

Steps Open terminal in Linux Type pwd and press enter to see what path you are in find . find / -name ‘mypage.htm’ The above command would search the system for any file named mypage.htm on the root and all subdirectories from the root, which would include your harddrive and any other drives you have plugged in. find .

How do I Count files in Linux?

If you need to find the total file count in a directory in Linux ( CentOS / RHEL etc ) then you can do this using following command : find . -type f | wc -l. or : find ./ -type f | wc -l. Both commands will have same affect and will count all the files in all sub directories in the current directory.