shell条件判断式语句中
一 两个文件之间进行比较
二 实战
[[email protected] ~]# ln /root/student.txt /tmp/stu
[[email protected] ~]# [ /root/student.txt -ef /tmp/stu ] && echo yes || echo no
yes
[[email protected] ~]# [ /root/initial-setup-ks.cfg -ef /tmp/stu ] && echo yes || echo no
no
三 两个整数之间的比较
四 实战
[[email protected] ~]# [ 23 -ge 22 ] && echo yes || echo no
yes
[[email protected] ~]# [ 22 -ge 22 ] && echo yes || echo no
yes
[[email protected] ~]# [ 12 -ge 22 ] && echo yes || echo no
no
[[email protected] ~]# [ 12 -le 22 ] && echo yes || echo no
yes