Question

我的文件包含以下内容：

我想以IP 111,22,25格式打印输出。

我尝试过tr ' ' ,，但是它不起作用

Answer 1

在纯Bash中：

# Read file into array
mapfile -t lines < infile

# Print to string, comma-separated from second element on
printf -v str '%s %s' "${lines[0]}" "$(IFS=,; echo "${lines[*]:1}")"

# Print
echo "$str"

输出：

IP 111,22,25

Answer 2

我会选择：

{ read a; read b; read c; read d; } < file
echo "$a $b,$c,$d"

这也将起作用：

xargs printf "%s %s,%s,%s" < file

Answer 3

欢迎来到paste

$ paste -sd " ," file
IP 111,22,25

通常paste所做的是将其写入由每个给定文件的顺序对应行组成的标准输出行，并用字符分隔。选项-s的作用不同。它声明以字符作为分隔符顺序粘贴文件的每一行。使用-d标志时，可以提供要使用的定界符列表，而不是-字符。在这里，我给出了一个列表" ,"，该列表指示使用空格，然后仅使用逗号。

Answer 4

尝试cat file.txt | tr '\n' ',' | sed "s/IP,/IP /g"

tr删除新行，sed将IP,111,22,25更改为IP 111,22,25

Answer 5

使用Perl

$ cat captain.txt
IP
111
22
25

$ perl -0777 -ne ' @k=split(/\s+/); print $k[0]," ",join(",",@k[1..$#k]) ' captain.txt
IP 111,22,25
$

Answer 6

以下awk脚本将执行请求的操作：

awk 'BEGIN{OFS=","} FNR==1{first=$0;next} {val=val?val OFS $0:$0} END{print first FS val}' Input_file

说明： 现在添加上述代码的说明。

awk '                      ##Starting awk program here.
BEGIN{                     ##Starting BEGIN section here of awk program.
  OFS=","                  ##Setting OFS as comma, output field separator.
}                          ##Closing BEGIN section of awk here.
FNR==1{                    ##Checking if line is first line then do following.
  first=$0                 ##Creating variable first whose value is current first line.
  next                     ##next keyword is awk out of the box keyword which skips all further statements from here.
}                          ##Closing FNR==1 BLOCK here.
{                          ##This BLOCK will be executed for all lines apart from 1st line.
  val=val?val OFS $0:$0    ##Creating variable val whose values will be keep concatenating its own value.
}
END{                       ##Mentioning awk END block here.
  print first FS val       ##Printing variable first FS(field separator) and variable val value here.
}' Input_file              ##Mentioning Input_file name here which is getting processed by awk.

如何使用空格和逗号连接行

6 个答案: