$P

for Name in oldboy{01..10}
do

CheckUser=$(id $Name|wc -l)

CheckUser=$(grep -w "$Name" /etc/passwd|wc -l)

if [ $CheckUser -eq 1 ];then
action "$Name already exist!" /bin/false
continue
fi

useradd $Name &&\
PASS=$(echo $RANDOM|md5sum|cut -c 1-8)

echo "$PASS"|passwd --stdin $Name &>/dev/null

echo -e "$Name:$PASS"|tee -a $P|chpasswd

R=$?
if [ $R -eq 0 ];then
action "Useradd $Name is successful!" /bin/true
fi

echo -e "$Name\t$PASS" >>$P

done

批量创建10个系统帐号oldboy01-oldboy10并设置密码（密码为随机8位字符串）。

原文：http://blog.51cto.com/9447803/2161414