sed -n选项，s命令，和p命令 三个同时使用，如下：
[root@ansible-server-bm scripts]# cat /datas/shells/cdn_config/cdn_domainName.property
##Don't delete the file
domainName=img.xxx.com
[root@ansible-server-bm scripts]# sed -n 's/^domainName=\(.*\)/\1/p' /data/shell/cdn_config/cdn_domainName.property
img.xxx.com
生产案列1：
[root@ansible-server-xray2tl cdn_config]# cat xx
job-2-xray2tl.production:
----------
pid:
27152
retcode:
0
stderr:
stdout:
img.b-maintain.com
web-3-xray2tl.production:
----------
pid:
374073
retcode:
0
stderr:
stdout:
img.xxxtyt.com
job-1-xray2tl.production:
----------
pid:
59904
retcode:
0
stderr:
stdout:
img.b-maintain.com
admin-1-xray2tl.production:
----------
pid:
338925
retcode:
0
stderr:
stdout:
img.b-maintain.com
web-4-xray2tl.production:
----------
pid:
376313
retcode:
0
stderr:
stdout:
img.xxxtyt.com
web-1-xray2tl.production:
----------
pid:
52811
retcode:
0
stderr:
stdout:
img.xxxtyt.com
web-2-xray2tl.production:
----------
pid:
365946
retcode:
0
stderr:
stdout:
img.xxxtyt.com
[root@ansible-server-xray2tl cdn_config]# sed -n '/xray2tl/{h;:z;n;/stdout/!bz;{n;H;g;s/\n//;p}}' xx
job-2-xray2tl.production: img.b-maintain.com
web-3-xray2tl.production: img.xxxtyt.com
job-1-xray2tl.production: img.b-maintain.com
admin-1-xray2tl.production: img.b-maintain.com
web-4-xray2tl.production: img.xxxtyt.com
web-1-xray2tl.production: img.xxxtyt.com
web-2-xray2tl.production: img.xxxtyt.com
