staythisway

[root@localhost ~]# cat output.sh -n 1 #!/bin/bash 2 3 file=$1 4 echo "input file is $file" 5 6 if [ -r $file ] 7 then 8 echo "File has read access" 9 else 10 echo "File does not have read access" 11 fi 12 13 if [ -w $file ] 14 then 15 echo "File has write permission" 16 else 17 echo "File does not have write permission" 18 fi 19 20 if [ -x $file ] 21 then 22 echo "File has execute permission" 2..

if 조건문 대괄호 쓸 때는 띄어쓰기 [ $val == "dog"] condition 종류 [[ NUM -eq NUM ]] equl [[ NUM -ne NUM ]] not equal [[ NUM -lt NUM ]] less than [a -lt b] a true [[ NUM -le NUM ]] less than or equal [a -lt b] a true [[ NUM -gt NUM ]] greater than a>b [[ NUM -ge NUM ]] greater than or equal a>=b [[ -z STRING ]] Empty string --> val="" [ -z $val ] --> true [[ -n STRING ]] NOT empty string [[ STRING == STRING ]] ..