diff --git a/newset.sh b/newset.sh
index 1b2e9f7..9b35e19 100644
--- a/newset.sh
+++ b/newset.sh
@@ -78,24 +78,24 @@ cat>>/etc/profile<<EOF
 PS1='\e[1;37m[\e[m\e[1;32m\u\e[m\e[1;33m@\e[m\e[1;35m\H\e[m \e[4m\`pwd\`\e[m\e[1;37m]\e[m\e[1;36m\e[m\n$'
 
 USER_IP=`who -u am i 2>/dev/null| awk '{print $NF}'|sed -e 's/[()]//g'`
-if [ "$USER_IP" = "" ]
+if [ "\$USER_IP" = "" ]
 then
-USER_IP=`hostname`
+USER_IP=\`hostname\`
 fi
 if [ ! -d /var/log/history ]
 then
 mkdir -p /var/log/history
 chmod 777 /var/log/history
 fi
-if [ ! -d /var/log/history/${LOGNAME} ]
+if [ ! -d /var/log/history/\${LOGNAME} ]
 then
-mkdir -p /var/log/history/${LOGNAME}
-chmod 300 /var/log/history/${LOGNAME}
+mkdir -p /var/log/history/\${LOGNAME}
+chmod 300 /var/log/history/\${LOGNAME}
 fi
 export HISTSIZE=4096
-DT=`date "+%Y-%m-%d_%H:%M:%S"`
-export HISTFILE="/var/log/history/${LOGNAME}/${USER_IP}-log.$DT"
-chmod 600 /var/log/history/${LOGNAME}/*log* 2>/dev/null
+DT=\`date "+%Y-%m-%d_%H:%M:%S"\`
+export HISTFILE="/var/log/history/\${LOGNAME}/\${USER_IP}-log.$DT"
+chmod 600 /var/log/history/\${LOGNAME}/*log* 2>/dev/null
 ######################代码结束#######################
 EOF
 }