linux - How to understand sed -n '/,/s/,/ /gp'

Question

I saw this writing in the book

 uptime|sed -n '/,/s/,/ /gp'

I can understand this way of writing sed 's/,/ /gp', but I can't understand the above.

Answer 1

1. s命令前面是确定查找那些行。
   问题中/,/是个正则表达式，表示只要该行中有逗号，那么就执行s命令。 如果你写成1,2s means only executing the s command on the first and second lines;

2. s命令后面是命令内容： /将要被替换的内容/替换成的内容/， 对应问题中 s/,/ /;

In summary, find the lines with commas and perform matching: if a comma is matched, replace the comma with a space. As for gp, I won’t explain too much, I believe you understand.

Answer 2

Match lines with , , and replace all , with spaces