How do you display the nth line in Unix?
Below are three great ways to get the nth line of a file in Linux.
- head / tail. Simply using the combination of the head and tail commands is probably the easiest approach. …
- sed. There are a couple of nice ways to do this with sed . …
- awk. awk has a built in variable NR that keeps track of file/stream row numbers.
How do I print the nth column in Unix?
How to do it…
- To print the fifth column, use the following command: $ awk ‘{ print $5 }’ filename.
- 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 print a specific line 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 : $>head -n LINE_NUMBER file.txt | tail -n + LINE_NUMBER Here LINE_NUMBER is, which line number you want to print. Examples: Print a line from single file.
What command will print nth line?
N,$ with “p” command prints from Nth line to end of file. For example 4,$p prints from 4th line to end of file.
How do I grep a file in Linux?
How to use the grep command in Linux
- Grep Command Syntax: grep [options] PATTERN [FILE…] …
- Examples of using ‘grep’
- grep foo /file/name. …
- grep -i “foo” /file/name. …
- grep ‘error 123’ /file/name. …
- grep -r “192.168.1.5” /etc/ …
- grep -w “foo” /file/name. …
- egrep -w ‘word1|word2’ /file/name.
How do I print awk?
To print a blank line, use print “” , where “” is the empty string. To print a fixed piece of text, use a string constant, such as “Don’t Panic” , as one item. If you forget to use the double-quote characters, your text is taken as an awk expression, and you will probably get an error.
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.
What is awk Unix command?
Awk is a scripting language used for manipulating data and generating reports. The awk command programming language requires no compiling, and allows the user to use variables, numeric functions, string functions, and logical operators. … Awk is mostly used for pattern scanning and processing.
How do cats last 10 lines?
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.
How do I print a file in Unix?
Printing Files
- The pr Command. The pr command does minor formatting of files on the terminal screen or for a printer. …
- The lp and lpr Commands. The command lp or lpr prints a file onto paper as opposed to the screen display. …
- The lpstat and lpq Commands. …
- The cancel and lprm Commands.
How do you print a range of lines in Linux?
Printing given range of lines using sed
Sed is a stream editor. A stream editor is used to perform basic text transformations on an input stream (a file or input from a pipeline). above is the sed command example to print the range from 5 to 10, out of 1-20 lines. -n option is to print ‘n’ number of lines.