Find longest line in file in linux
WebJan 2, 2024 · Method 1: Using the Awk command, find the longest line in a file Let’s prepend the size of each line with a one-liner in awk to help us determine which lines are … WebYou could use awk to print the length of each line (length()) and the line number (NR), then reverse (-r) sort the result by number (-n): $ awk '{ print length(), NR, $0 "sort -rn" }' …
Find longest line in file in linux
Did you know?
Web#!/bin/bash max=-1 while IFS= read -r line; do [ [ $ {#line} -gt $max ]] && max=$ {#line} done < "$1" echo "longest line is $max chars long" This idiom is used to read the line exactly verbatim: IFS= read -r line Demo: create a file with leading/trailing whitespace and a backslash $ echo ' h\bHello ' > file WebNov 20, 2015 · To get the longest word, we can use awk 's length function. Then sort, then head and cut to get the right line and field. awk '$2~/^a/ {print length ($2), $2}' file sort -k1 head -1 cut -d" " -f1 To get the most frequent A-word, a sort and awk: sort -k1 file awk '$2~/^a/ {print $2; exit}'
WebJan 21, 2024 · On a Linux system, the need to find a string in a file can arise quite often. On the command line, the grep command has this function covered very well, but you’ll … WebNov 1, 2016 · sed '/.\ {2049\}/d' file.out The regular expression .\ {2049\} would match any line that contains a substring of 2049 characters (another way of saying "at least 2049 characters"). The d command deletes them …
WebMar 23, 2024 · Method 7: Using R Command Step 1 − Open terminal and navigate to directory where file is located. Step 2 − Type following command − WebThe while create a new flux of data, containing the length of each line in the file. The grep exclude empty lines (that's 0 chars in length); there are no empty line in your case, but prevent is better than cure. Then sort put line lengths in ascending order, and tail get the last line, that's the highest number (the longest line length).
WebJul 19, 2024 · -L: The ‘wc’ command allow an argument -L, it can be used to print out the length of longest (number of characters) line in a file. So, we have the longest character line Arunachal Pradesh in a file state.txt and Hyderabad in the file capital.txt.
WebJan 21, 2024 · To search a file for a text string, use the following command syntax: $ grep string filename For example, let’s search our document.txt text document for the string “example.” $ grep example document.txt … shootmonWebApr 5, 2024 · The -L option prints the length of the longest line for each file. If more than one file is specified, the total row shows the longest line across all files. For example, to find the longest line in all the TXT files in a directory, type: wc -L *.txt. wc processes the TXT files and, for each file, prints the number of characters in the longest ... shootmooreWebOct 31, 2016 · Assuming the Length values in the FASTA headers are correct, I would extract them from there: sed -nre 's/^>.*_Length_ ( [0-9]+) .*/\1/p' \ then sort them numerically sort -n \ then output the first and last line sed -ne '1p;$p' In one statement: sed -nre 's/^>.*Length_ ( [0-9]+) .*/\1/p' sort -n sed -ne '1p;$p' shootnbox adresseWebMar 3, 2024 · wc (short for word count) is a command line tool in Unix/Linux operating systems, which is used to find out the number of newline count, word count, byte and character count in the files … shootmoreWebJan 12, 2024 · The command is made up of different elements. find ./ -name “*.page” -type f -print0 : The find action will start in the current directory, searching by name for files that match the “*.page” search string. Directories will not be listed because we’re specifically telling it to look for files only, with -type f . shootmyride atlamerch.comWebSep 24, 2024 · The first command finds all lines in files in the directory containing "ER" (you only need the -R option if you have subdirectories, otherwise the glob * is all you need), removes the lines with Cheese, and then finds the longest of those lines with the wc … shootmedia llcWebI think my biggest problem now will be the length of the line in question (2,096,772 chars) and the sheer size of the file (~314Mb). I may see if re-arranging the regex helps speed thing up a bit. Thanks for pointing me in the right direction - I thought their *must* be a way to do it with grep (rather than find which I initially wrote by ... shootnhunt