➜ testawk'{print NR,NF,$0} END {print FILENAME}'data2.txt16line1:This is the header line1.27line2:This is the first data line2.37line3:This is the second data line3.46line4:This is thelastline4. data2.txt #实例3
Two lines oftesttext. Three lines oftesttext. $ $awk'{print $1}'data.txt One Two Three[root@Centos8_test awktest]# awk '{print $1 " " $2}' data # $1 " " $2 第一列 空格 第二列One line Two lines Three lines -F 分隔符 多个分隔符情况 awk-F'[=,()]' 表示以=或,或 ( ...
[root@www ~]# last -n 5| awk '{print $1 "\t lines: " NR "\t columns: " NF}' root lines: 1 columns: 10 root lines: 2 columns: 10 root lines: 3 columns: 10 dmtsai lines: 4 columns: 10 root lines: 5 columns: 9 # 注意喔,在 awk 内的 NR, NF 等变量要用大写,且不需要...
grep（Globel Search Regular Expression and Printing out the line）全面搜索正则表达式并把行打印出来，是一种强大的文本搜索工具，是一个对行进行操作的搜索工作，它能使用正则表达式搜索文本，并把匹配的行打印出来。Unix 的 grep 家族包括 grep 、egrep 、 fgrep 。egrep 表示扩展的 grep ，相比 grep 支持更多...
As the example above shows, theinput.txtfile contains a few lines. Also, the second word in each line is a programming language name. Now, let’s extract and print the language names using theawkcommand. We can treat the text as space-separated values. So, a compact one-liner usingawk...
awk '$3>0 {print $1, $2*$3}' emp.data 得到如下输出: kathy 40 Mark 100 Mary 121 Susie 76.5 该命令告诉系统执行括号内的awk程序,从输入文件 emp.data 获取所需要的数据。引号内的部分是个完整的awk程序,包含单个 模式-动作 语句。模式 $3>0 用于匹配第三列大于0的输入行,动作:{print $1, $2...
which means if the first field matches Audrey, then print the second field.In awk, $0 is the whole line of arguments.Awk scans each input file for lines that match any of a set of patterns specified literally in prog or in one or more files specified as -f progfile. With each pattern...
Well, it depends on your definition of an “empty” line. If you consider only blank lines (according to POSIX) are empty, then this is correct. But maybe would you prefer considering whitespace-only lines as empty too? awk 'NF { COUNT+=1 } END { print COUNT }' file 8 This time ...
In AWK, you’d just have two filters (rules) that would look like $3 !~ /medium=water/ { next } $4 ~ /4\d\d/ { print $0 } which says “skip this line if the 3rd field does not match the regex” and “print this line if the 4th field does match the regex”. This can ...
The program prints those lines that begin with c or b. The regular expression is placed between two slash characters. The match function sets the RSTART variable; it is the index of the start of the matching pattern. $ awk 'match($0, /i/) {print $0 " has i character at " RSTART}'...