linux 密码安全脚本

 #!/bin/bash
 ＃by:osx1260@.com
 DIESO=/etc/pam.d
 PAMSO=$(ls $DIESO/* |awk -F'/' '{print $4}')
 NEPAMUN='password    sufficient pam_unix.so md5 shadow nullok try_first_pass use_authtok remember=5'
 for PAMS in $PAMSO;do
     if [[ -n $(cat "$DIESO/$PAMS" | grep "shadow" | awk '{print $1}') ]];then
         PAMUN=''
         PAMUN=$(cat "$DIESO/$PAMS" | grep "shadow" | awk '{print $0}')
         if [[ -n $(echo $PAMUN | grep "remember" | awk '{print $1}') ]];then
                 echo "The password remember has been set"
         else
         sed -i "s/$PAMUN/$NEPAMUN/" $DIESO/$PAMS
         fi
     fi
 
 done

 #!/bin/sh
 #by:osx1260@.com
 DIESO=/etc/pam.d
 PAMSO=$(ls $DIESO/* |awk -F'/' '{print $4}')
 NEPAMUN='password    sufficient pam_unix.so md5 shadow nullok try_first_pass use_authtok remember=5'
 NEWPASSET='password    requisite    pam_cracklib.so retry=3 difok=3 minlen=8 ucredit=-1 lcredit=-2 dcredit=-1 ocredit=-1'
 #retry=3 密码重试次数为3次
 #difok=3 允许新密码中有3个字符与旧密码相同
 #minlen=8 密码最小长度为8 注意：对root用户无效，root下设置其他用户此参数也无效，用户自己修改自己的密码时才有效
 #ucredit=-1 密码中必须包含一个大写字母
 #lcredit=-2 密码中必须包含最少两个小写字母
 #dcredit=-1 密码中必须包含一个数字
 #ocredit=-1 密码中最少必须包含一个标点符号
 [ -f /lib/security/pam_cracklib.so ] && echo "start config pam_cracklib.so"
 for PAMS in $PAMSO;do
     if [[ -n $(cat "$DIESO/$PAMS" | grep pam_cracklib | awk '{print $1}') ]];then
     PASSET=''
     PASSET=$(cat "$DIESO/$PAMS" | grep "pam_cracklib.so" | awk '{print $0}')
     if [[ -n $( echo $PASSET | grep "difok" | awk '{print $1}') ]];then
         echo "The password complexity rule has been set "
     else
         sed -i "s/${PASSET}/${NEWPASSET}/" $DIESO/$PAMS
     fi
     fi

 done

限制ｔｔｙ

#!/bin/sh
for t in $(cat /etc/securetty | grep "^tty" | grep -v "tty[1,2]$");
do
    T=''
    T=$t
    sed -i "s/$T/#$T/" /etc/securetty
done