Using the “awk” Command to Print the Last Column from a File

1. How do I print the last column in awk?
2. How do I print the last column of a file in Linux?
3. How do you print the last second column in awk?
4. How do you get the last element in awk?
5. How do I print last line of awk?
6. How do you sum in awk?
7. How do I get the last column of a file in Unix?
8. What is NR in awk command?
9. How do I print a column in Linux?
10. How do I use awk with delimiter?
11. How do I print the last second line in Unix?
12. How do I get the first column in awk?

How do I print the last column in awk?

As soon as you will hit the Enter key, all the values of the last column of the file awk. txt will appear on your terminal as shown in the following image. The awk command will read this column whereas the print command will be responsible for displaying its values on the terminal.

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

Example 6: Print the last column of a file

The following `awk` command will print the last column of customers. txt. Because no field separator is used in the command, the space will be used as a field separator.

How do you print the last second column in awk?

Print second-to-last column/field in `awk`

1. NF is the last field index, $NF is the value of the last field – glenn jackman Jan 19 '10 at 21:00.
2. that makes sense now. thats why the dollar outside the parenthesis works I suppose – Brian G Feb 11 '10 at 17:09.

How do you get the last element in awk?

as NF refers to the number of fields of the current record, printing $NF means printing the last one. Another option is to use bash parameter substitution.

How do I print last line of awk?

awk file example, line, file, Pure bash: $ while read line; do [ -z "$line" ] && continue ;echo $line##* ; done < file example. line.

How do you sum in awk?

2 Answers. The -F',' tells awk that the field separator for the input is a comma. The sum+=$4; adds the value of the 4th column to a running total. The ENDprint sum; tells awk to print the contents of sum after all lines are read.

How do I get the last column of a file in Unix?

Performance

1. using awk : $ time awk 'print $NF' datafile > /dev/null real 0m12.124s user 0m10.704s sys 0m0.709s.
2. using grep : $ time grep -o '\S\+$' datafile > /dev/null real 0m36.731s user 0m36.244s sys 0m0.401s $ time grep -o '\S*$' datafile > /dev/null real 0m40.865s user 0m39.756s sys 0m0.415s.

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 print a column in Linux?

How to do it...

1. To print the fifth column, use the following command: $ awk ' print $5 ' filename.
2. We can also print multiple columns and insert our custom string in between columns. For example, to print the permission and filename of each file in the current directory, use the following set of commands:

How do I use awk with delimiter?

Processing the delimited files using awk. Where, -F: – Use : as fs (delimiter) for the input field separator. print $1 – Print first field, if you want print second field use $2 and so on.

How do I print the last second line in Unix?

4 Answers. Use echo -e for backslash interpretation and to translate \n to newlines and print the interested line number using NR . With multiple lines and do, tail and head can be used to print any particular line number.

How do I get the first column in awk?

awk to print the first column. The first column of any file can be printed by using $1 variable in awk. But if the value of the first column contains multiple words then only the first word of the first column prints. By using a specific delimiter, the first column can be printed properly.