useradd.sh
#!/bin/bash
#-----------------<jihongrui@outlook.com>-----------------------
# 本脚本功能 删除系统不必要的用户和组，添加需要的用户和组，并设置强密码。
# 自动添加 admin sudo 无密码权限
PTAH="/sbin:/usr/sbin:/usr/local/sbin:/bin:/usr/bin:/usr/local/bin"
export PTAH
DATE=$(/bin/date +%Y-%m-%d)
#del user group
FIUSER="/etc/passwd"
FIGROUP="/etc/group"
FIPASS="/etc/shadow"
olduser=(
adm
lp
sync
shutdown
halt
news
uucp
operator
games
gopher
ftp
dip
pppusers
)
for x in ${olduser[@]}
do
grep ${x} ${FIUSER} && userdel ${x} &>/dev/null
grep ${x} ${FIGROUP} && groupdel ${x} &>/dev/null
done
#useradd www code szqsadmin backup
newuser=(
admin
www
code
backup
)
PASSLOG="${DATE}_passlog.txt"
[ -f ${PASSLOG} ] && echo >${PASSLOG}
for u in ${newuser[@]}
do
PASS=`date +%s%N|md5sum|openssl rand -base64 32`
useradd ${u} && \
echo "$PASS" | passwd --stdin ${u}
echo -e "\t Newuser:${u} \t Newpass:${PASS}" >>${PASSLOG}
if [[ $u = "admin" ]]
then
sed -i '98a admin ALL\=\(ALL\) NOPASSWD\: ALL' /etc/sudoers
fi
done
chmod 600 ${PASSLOG}
