我的/etc/pam.d/system-auth-ac
设置了以下auth
个参数:
auth required pam_env.so
auth sufficient pam_unix.so nullok try_first_pass
auth requisite pam_succeed_if.so uid >= 500 quiet
auth required pam_deny.so
我想在pam_tally2.so
之后插入pam_env.so
。所以我希望它是:
auth required pam_env.so
auth required pam_tally2.so onerr=fail audit silent deny=5 unlock_time=900
auth sufficient pam_unix.so nullok try_first_pass
auth requisite pam_succeed_if.so uid >= 500 quiet
auth required pam_deny.so
我正在使用的脚本是:
#! /bin/bash
grep "pam_tally2" /etc/pam.d/system-auth-ac &> /dev/null
if [ $? -ne 0 ];
then
sed -i '/^[]*account[]*required[]*pam_unix.so/aauth\trequired\tpam_tally2.so onerr=fail audit silent deny=5 unlock_time=900' /etc/pam.d/system-auth-ac
else
sed -i 's/.*pam_tally2.*/auth\trequired\tpam_tally2.so onerr=fail audit silent deny=5 unlock_time=900/1' /etc/pam.d/system-auth-ac
fi
但它给出了这个错误:
sed: -e expression #1, char 116: unterminated address regex
我做错了什么?
答案 0 :(得分:2)
您可以在gnu-sed中使用a
命令:
sed -i.bak '/pam_env\.so$/a\
auth required pam_tally2.so onerr=fail audit silent deny=5 unlock_time=900
' /etc/pam.d/system-auth-ac
编辑:查看您发布的答案,awk
命令似乎比grep
中的sed
和2 if/else
命令更适合您条件:
val='auth\trequired\tpam_tally2.so onerr=fail audit silent deny=5 unlock_time=900'
awk -v val="$val" '/^auth[[:blank:]]+required[[:blank:]]+pam_env\.so/ {
print $0 RS val; next} /pam_tally2\.so/{next} 1' /etc/pam.d/system-auth-ac
auth required pam_env.so
uth required pam_tally2.so onerr=fail audit silent deny=5 unlock_time=900
auth sufficient pam_unix.so nullok try_first_pass
auth requisite pam_succeed_if.so uid >= 500 quiet
auth required pam_deny.so
答案 1 :(得分:1)
您可以使用以下sed命令。
sed 's/^auth[[:blank:]]\+required[[:blank:]]\+pam_env\.so/&\nauth required pam_tally2.so onerr=fail audit silent deny=5 unlock_time=900' file
你的正则表达式失败了,因为你重复了一个空字符类[]
,零次或多次,这没有任何意义。因此,您需要将[]*
更改为[ ]*
或<space>*
以重复零空格或空格的空格字符。
答案 2 :(得分:0)
我的剧本应该是:
false
工作正常!