下面是另一种使用awk的方法:

awk 'ORS=NR%2?FS:RS' file

$ cat file KEY 4048:1736 string 3 KEY 0:1772 string 1 KEY 4192:1349 string 1 KEY 7329:2407 string 2 KEY 0:1774 string 1 $ awk 'ORS=NR%2?FS:RS' file KEY 4048:1736 string 3 KEY 0:1772 string 1 KEY 4192:1349 string 1 KEY 7329:2407 string 2 KEY 0:1774 string 1 As indicated by Ed Morton in the comments, it is better to add braces for safety and parens for portability. awk '{ ORS = (NR%2 ? FS : RS) } 1' file ORS stands for Output Record Separator. What we are doing here is testing a condition using the NR which stores the line number. If the modulo of NR is a true value (>0) then we set the Output Field Separator to the value of FS (Field Separator) which by default is space, else we assign the value of RS (Record Separator) which is newline. If you wish to add , as the separator then use the following: awk '{ ORS = (NR%2 ? "," : RS) } 1' file

最简单的方法是:

删除偶数行，并将其写入某个临时文件1。 删除奇数行，并将其写入某个临时文件2。 使用粘贴命令和-d(表示删除空格)将两个文件合并为一个文件

Sed '0~2d'文件> 1 && & Sed '1~2d'文件> 2 && &粘贴-d " " 1 2

"ex"是一个可脚本化的行编辑器，与sed、awk、grep等属于同一家族。我觉得这可能就是你要找的东西。许多现代vi克隆/后继者也有一个vi模式。

 ex -c "%g/KEY/j" -c "wq" data.txt

这就是说，对于每一行，如果它匹配"KEY"执行下一行的j。该命令完成后(针对所有行)，发出一个w rite和q uit。

你可以像这样使用awk来合并2对行:

awk '{ if (NR%2 != 0) line=$0; else {printf("%s %s\n", line, $0); line="";} } \
     END {if (length(line)) print line;}' flle

cat input.txt

KEY 4048:1736 string
3
KEY 0:1772 string
1
KEY 4192:1349 string
1
KEY 7329:2407 string
2
KEY 0:1774 string
1

paste -sd ' \n' input.txt

KEY 4048:1736 string 3
KEY 0:1772 string 1
KEY 4192:1349 string 1
KEY 7329:2407 string 2
KEY 0:1774 string 1

paste -sd ' \n' input.txt | rev | sed 's/ / , /' | rev

KEY 4048:1736 string , 3
KEY 0:1772 string , 1
KEY 4192:1349 string , 1
KEY 7329:2407 string , 2
KEY 0:1774 string , 1

awk:

awk 'NR%2{printf "%s ",$0;next;}1' yourFile

注意，在输出的末尾有一个空行。

sed:

sed 'N;s/\n/ /' yourFile