首先我们构造一个测试文件data.txt,它的内容如下: thisisthe 1st linethisisthe 2nd linethisisthe 3rd linethisisthe 4th linethisisthe 5th line (1)actions 常见的 actions 一般是print,print命令会打印在其后面指定的内容 > awk'{ print $0 }'data.txt# this is the 1st line# this is the 2nd line...
.csv #this to print the first line from the .ttt file as rows of the first column in the .csv file awk '{ for(i=1; i<=NF; i++) {array[i]+=$i} row++} END {for(i=1; i<=NF; i++) {print array[i]/row}}' "$count".spd >> "$count".csv #this is to print the ...
print strftime("Format 9: %T",systime()) print strftime("Format 10: %x",systime()) print strftime("Format 11: %X",systime()) print"--- single line format with %t--"print strftime("%Y %t%B %t%d",systime()) print"--- multi line format with %n --"print strftime("%Y%n%B%n...
awk '{print NR, $1}' file # Print every line after erasing the 2nd field{不打印第2列} awk '{$2 = ""; print}' file # Print out 4 random numbers between 0 and 1{打印4个值在0、1之间的随机数} yes | head -4 | awk ‘{print rand()}’ # Print out 4 random integers modulo ...
variable = expression print [ expression-list ] printf format [ , expression-list ] next # skip remaining patterns on this input line exit # skip the rest of the input 如果stat1 和stat2 是陈述,以下也是陈述: {stat} {stat1; stat2} {stat1 stat2} if ( conditional ) statement [ else stat...
One line of test text. Two lines of test text. Three lines of test text. [root@localhost ~]# awk '{print $1}' data2.txt One Two Three 该程序用 $1 字段变量来表示“仅显示每行文本的第 1 个数据字段”。当然,如果你要读取采用了其他字段分隔符的文件,可以用 -F 选项手动指定。
awk '{ saved = $1; $1 = ""; print substr($0, 2), saved }'将第一个字段设置为 ""会在 $0的开头留下一个 OFS的副本。假设 OFS只是一个字符（默认情况下，它是一个单独的空格），我们可以用 substr($0, 2)删除它。然后我们附加保存的 $1副本。如果...
#!/bin/bash awk -F ":" ' { arr[$1] = (arr[$1] "\n" $2) } END{ for(i in arr) { printf "["i"]" print arr[i] } } ' nowcoder.txt # 第 1 行: 111:13443 # arr["111"] 之前的值为空 "" # 解析步骤: arr["111"] = ("" "\n" $2) arr["111"] = ("" "\n...
Print sequence number and then column 1 of file: awk '{print NR, $1}' file Print every line after erasing the 2nd field awk '{$2 = ""; print}' file Print "hi" 28 times yes | head -28 | awk '{ print "hi" }' Print "hi.0010" to "hi.0099": ...
模式匹配是从函数式编程语言（例如：Haskell，Lisp）吸收而来的，用于为复杂的类型系统提供一个轻松的解构...