# 1.依次展示/etc/passwd中的用户名和UID。格式如:Hello,$USER,your UID is $UID.
# 2.统计一个有多少个用户
#!/bin/bash #Program Description: #Author: Created by ctu_lzq #Date: 2018/11/15 FILE="/etc/passwd" LINES=`cat $FILE |wc -l` #for i in `seq 1 $LINES`; for ((i=1;i<=$LINES;i++)); do userlist=`sed -n "$i""p" $FILE|awk -F: '{print $1}'` uidlist=`sed -n "$i""p" $FILE|awk -F: '{print $3}'` echo "Hello,$userlist,your UID is $uidlist" done echo "there are $LINES users"