How do I print a specific line using sed?
In this article of sed series, we will see how to print a particular line using the print(p) command of sed. Similarly, to print a particular line, put the line number before ‘p’. $ indicates the last line. !
How do I search for a specific line in Linux?
To do this, go to Edit -> Preferences and tick the box that says “Display line numbers.” You can also jump to a specific line number by using Ctrl + I .
How do I select a specific line in 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 a specific line using grep?
To print a specific number of lines before matching lines, use the -B ( or –before-context ) option.
How do I grep a specific line number?
The -n ( or –line-number ) option tells grep to show the line number of the lines containing a string that matches a pattern. When this option is used, grep prints the matches to standard output prefixed with the line number.
How do you display the nth line in Linux?
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 show the first line 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 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 see the last 10 lines in Linux?
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.
How do you print a 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.
How do I grep all files in a directory?
To grep All Files in a Directory Recursively, we need to use -R option. When -R options is used, The Linux grep command will search given string in the specified directory and subdirectories inside that directory. If no folder name is given, grep command will search the string inside the current working directory.
Which command is used to display the content of the file?
You can also use the cat command to display the contents of one or more files on your screen. Combining the cat command with the pg command allows you to read the contents of a file one full screen at a time. You can also display the contents of files by using input and output redirection.
How do I find a file in Linux command line?
Basic Examples
- find . – name thisfile.txt. If you need to know how to find a file in Linux called thisfile. …
- find /home -name *.jpg. Look for all . jpg files in the /home and directories below it.
- find . – type f -empty. Look for an empty file inside the current directory.
- find /home -user randomperson-mtime 6 -iname “.db”