Bash引号的那点事
http://www.igigo.net/archives/category/bash%E9%82%A3%E7%82%B9%E4%BA%8B/page/2、
filelist=`ls -al` echo $filelist # put contents of the file into a varible filecontent=`cat export.txt` echo $filecontent # produce a varible from a loop var1=`for i in 1 2 3 4 5 do echo -n $i # this echo is very important done` echo $var1 i=0 var2=`while [ $i -le 10 ] do echo -n $i #this echo is very important i=$((i+1)) done` echo $var2 word_count=$( wc -w $(ls -l | awk '{print $9}') ) echo $word_count word_count=`wc -w \`ls -l | awk '{print $9}'\`` # 反引号也可以嵌套替换,但是需要通过\进行转意 echo $word_count