Happy and Lovely family

3.Bash Scripting *인용 ===== # export ABC=test # echo ${ABC} # echo $ABC test #echo $(date) #echo `date` #echo "$(date)" *for문 ====== for var in a b c;do command1; command2; done *if 문 ====== 종료상태값 확인 : echo $? 0 :정상/ 1:비정상 / 2:에러(grep만) 0 - grep root /etc/passwd root:~~~~~ 1 - grep ROOT /etc/passwd # 2 - grep root /etc/passwdd grep: /etc/passwdd: No such file or directory *tty ===== echo test >&1..