awk nr

Example 3:Tail Test | awk 'begin{while (getline d) {split (d,test); for (i in test) {print test[i]} }} 'Example 4:Ls-al/home/zhangy/mytest | awk 'begin{while (getline d) {split (d,test); print test[9];}} 'Example 5:' {print ' max = ', max ($1,$2)}function max (one,two) {if (one > a) {return one;} else{return;} 'Example 6:#awk ' Begin{print ' What's y

Awk control function, awk Function Example$ Cat datafile Northwest NW Joel Craig 3.0. 98 3 4 Western WE Sharon Kelly 5.3. 97 5 23 Southwest SW Chris Foster 2.7. 8 2 18 Southern SO May Chin 5.1. 95 4 15 Southeast SE Derek Johnson 4.0. 7 4 17 Eastern EA Suan Beal 4.4. 84 5 20 Northeast ne tj Nicholas 5.1. 94 3 13 North NO Val Shultz 4.5. 89 5 9 Central CT Sheri Watson 5.7. 94 5 13 $

Printf- Align LeftWidth Field step, 0 for 0 step. Prec The maximum string length, or the number of digits to the right of the decimal%c ASCII characters%d integral type%e Scientific Counting method%f floating point type%g awk determines which floating-point number is converted to E or F%o octal%s string%x HexExample one:i161 Admin # df-th|awk ' {print $1,$5} 'Filesystem AvailRootfs 23G/dev/root 23GTmpfs 16G

Use the awk command to merge the two lines with the same name in the following two files.[[email protected] ~]# cat 1.txt Han Hailin 21-year-old Hailin Han 23-year-old Han Linhai 22-year-old Lin Han 24-year-old [[email protected] ~]# cat 2.txt Han Linhai male hailin Han Nan Han Hailin male Linhai Han NanOutput effect:Han Hailin 21-year-old male[[email protected] ~]# awk '

Awk command usage Awk Programming Language/Data Processing Engine Creator: Aho weinberger kernighan Check input based on pattern matching (read row-by-row output) Print the expected matching result to the screen Syntax format: Awk 'mode {operation}' file 1 file 2 ..... Common built-in Variables The ordinal number of the row being processed by

I. Directly process awk COMMANDS IN SHELL Awk '{print $0}' file Awk '/^ (11 + ?) \ 1 + $/{print $0} 'file // The famous regular that determines whether it is a prime number The preceding two commands are commands that can be directly executed in shell. The basic mode is awk pattern {action} file, which means that

/passwdOFS: Output field delimiter, default to white space characterAwk-v fs= ': '-v ofs= ': ' {print $1,$3,$7} '/etc/passwdRS: Enter the record delimiter, specify the line break at input, and the original newline character is still validAwk-v rs= ' {print} '/etc/passwdORS: Output record delimiter, output with specified symbol instead of line breakAwk-v rs= "-v ors= ' # # # ' {print} '/etc/passwdNF: Number of fieldsAwk-f: ' {print NF} '/etc/fstab, reference built-in variable without $

From: http://blog.chinaunix.net/space.php? Uid = 22133229 do = blog id = 1790099 Awk usage: awk 'pattern' {action }' Variable name meaningNumber of ARGC command line VariablesARGV command line meta ArrayFILENAME current input file nameNumber of records in the current FNR FileThe input field delimiter of FS. The default Delimiter is a space.RS input record delimiterNumber of domains in the current NF reco

Awk array statistics, awk Array Process the following file content, retrieve the domain name andDomain Name countSorting: (Baidu and sohu interview questions) 1 http://www.etiantian.org/index.html2 http://www.etiantian.org/1.html3 http://post.etiantian.org/index.html4 http://mp3.etiantian.org/index.html5 http://www.etiantian.org/3.html6 http://post.etiantian.org/2.html Results: mp3.etiantian.org 1post.etian

-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";mso-ansi-language:#0400;mso-fareast-language:#0400;mso-bidi-language:#0400;}--> 1. Introduction Retrieve various types of data from the original data file, remove the header, and output it to different files named according to the data type. This sorting and formatting task is a basic part of data analysis and processing. You can use awk, grep/SED/

is not started with your site's domain name string (in this case, www.example.com); All reference pages are displayed and the number of occurrences is counted. commands related to accessing IP addresses How many different IP accesses are counted: awk ' {print $} ' Access.log |sort|uniq|wc–l Count the number of pages per IP accessed: awk ' {++s[$1]} end {for (a in S) print A,s[a]} ' log_file The number of

Tags: multiple delimiter reference command blank line type print greater than waterawk 一种编程语言Syntax format: awk "option" ' Pattern{action} ' "File" ... awk [option] ' condition {action} ' [file] ...Note: There must be at least one space between each element in the awk command and in subsequent options and filesOption Description: parameter Options

awk Linux Three Musketeers boss filter, output content, a language. NR Representative Line numberThe first column, the second column, $ A, indicates that a row of NF indicates the last column after the specified delimiter-f Specifies the separator. = = is an assignment = = is the equal meaningWrite to: delimiter, first row in file passwd, 1th, 4 columns, and last column[[email protected] data]#

separator (the separator is saved in the variable FS, each segment is stored in a variable starting from $1 and can be referenced or formatted for output. Usage: awk [options] 'project' file... awk [option]... 'pattern' {action1; action2 ...} 'File... common options:-F fs: Specifies the input separator-v Var_name = VALUE: Custom variable-f scriptfile: load the awk