大家看看这个错在什么地方？

lovevmwarer

$ cat test1.sh
if [ `cat a.txt | wc -l | awk '{print $1}' -lt 20`  ]
then
  echo 'small'
fi



sh test1.sh

awk: cmd. line:1: fatal: cannot open file `-lt' for reading (No such file or directory)

nhw_cs

if [ `cat a.txt | wc -l | awk '{print $1}'` -lt 20 ]

飞鸿无痕

楼上正解！！！！！

linuxboy823

把lt都引进去了，注意看报错！