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How do I show the first 10 lines in Linux?

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How do I show the first 10 lines 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 you cat first 10 lines of a file? 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 <Enter>. 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 see the last 10 lines of a file in Linux? Linux Tail Command Syntax

Tail is a command which prints the last few number of lines (10 lines by default) of a certain file, then terminates. Example 1: By default “tail” prints the last 10 lines of a file, then exits. as you can see, this prints the last 10 lines of /var/log/messages.

How do I print the first 5 lines in Linux? To print the first n lines, we use the -n or –lines option with the head command as shown below. Suppose we want to display four lines of the text. txt file then we have to execute the command as shown below. To print lines between m and n, we use the head and tail command in the Linux system as shown below.

How do I show the first 10 lines in Linux? – Additional Questions

How do I find Top 10 files in Linux?

Find the Largest Top 10 Files and Directories On a Linux
  1. du command : It estimates file space usage.
  2. sort command : Sort lines of text files or given input data.
  3. head command : Output the first part of files i.e. to display first 10 largest file.
  4. find command : It Searches file on Linux machine.

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. Displays the last 100 bytes of the file ( without reguard for the lines).

Which of the following will show the first 5 lines of the input file?

The head command reads the first few lines of any text given to it as an input and writes them to standard output (which, by default, is the display screen).

How do I print a specific line in Linux?

  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. To print 4th line from the file then we will run following commands.

How do I print a 3rd line in Unix?

Take your pick:
  1. # Take the last line of the top three lines.
  2. head -n 3 my. txt | tail -n 1.
  3. # Tell sed to “be quiet”, and print just the third line.
  4. sed -n 3p my. txt.
  5. # Tell sed to delete everything except the third line.
  6. sed ‘3! d’ my.
  7. # Tell awk to print the third input record of the current file.
  8. awk ‘FNR==3 {print}’ my.

Which command will output only the first five lines of the text TXT file Linux?

It is the complementary of Tail command. 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.

Which is the following commands are used to display last 10 lines of the file?

The tail command, as the name implies, print the last N number of data of the given input. By default it prints the last 10 lines of the specified files.

How do I grep a line in Linux?

To search multiple files with the grep command, insert the filenames you want to search, separated with a space character. The terminal prints the name of every file that contains the matching lines, and the actual lines that include the required string of characters. You can append as many filenames as needed.

How do I see the third line of a file in Linux?

3 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 you find the 10th line in a text file?

Where NUM is the number of the line you want to print; so, for example, sed ’10q;d’ file to print the 10th line of file .

What does 777 mean in Linux?

777 – all can read/write/execute (full access). 755 – owner can read/write/execute, group/others can read/execute. 644 – owner can read/write, group/others can read only.

What does chmod 444 mean?

444 = (r– r– r–): owner/group/others are all only able to read the file. They cannot write to it or execute it.

What is chmod 744?

sets read and write permissions for owner and group, and provides read to others. chmod 744 file1. sets read, write and execute for the owner and read only for the group and all others. chmod 777 file1. sets read, write and execute for everyone.

What does chmod 555 mean?

What Does Chmod 555 Mean? Setting a file’s permissions to 555 makes it so that the file cannot be modified at all by anyone except the system’s superuser (learn more about the Linux superuser).

What does chmod 644 mean?

Permissions of 644 mean that the owner of the file has read and write access, while the group members and other users on the system only have read access.

What does chmod 666 do?

chmod 666 file/folder means that all users can read and write but cannot execute the file/folder; chmod 777 file/folder allows all actions for all users; chmod 744 file/folder allows only user (owner) to do all actions; group and other users are allowed only to read.

What does chmod 111 do?

Chmod example

Start from the owner’s access – we want them to be able to read, write, and execute, so we can write this symbolically as rwx. This is our first triad. As we let the owner do all three actions, its binary code is 111. In the octal numeral system, it is the same as 7 (1112 = 1 * 22 + 1 * 21 + 1* 20 = 78).