使用eval用变量的值作为新的变量名 博客分类： linux

[root@localhost ~]# x_mm="yyy"
[root@localhost ~]# s=x
[root@localhost ~]# cat test.txt 
alt="yyy/20150823020537310.jpg" src=
asdasd
asdasdasdasd
cvdawsdas
[root@localhost ~]# sed -i s"#$(eval echo $`echo $s`_mm)#xxx#"g test.txt 
[root@localhost ~]# cat test.txt 
alt="xxx/20150823020537310.jpg" src=
asdasd
asdasdasdasd
cvdawsdas