diff --git a/xCAT-client/xCAT-client.spec b/xCAT-client/xCAT-client.spec
index 8ed907edf..e216c20c7 100644
--- a/xCAT-client/xCAT-client.spec
+++ b/xCAT-client/xCAT-client.spec
@@ -319,7 +319,7 @@ MANPATH=\$XCATROOT/share/man:\$MANPATH
 export XCATROOT PATH MANPATH
 export PERL_BADLANG=0
 # If /usr/local/share/perl5 is not already in @INC, add it to PERL5LIB
-perl -e "print \"@INC\"" | egrep "(^|\W)/usr/local/share/perl5($| )" > /dev/null
+perl -e "print \"@INC\"" | grep -E "(^|\W)/usr/local/share/perl5($| )" > /dev/null
 if [ \$? = 1 ]; then
     export PERL5LIB=/usr/local/share/perl5:\$PERL5LIB
 fi
@@ -343,7 +343,7 @@ else
 endif
 setenv PERL_BADLANG 0
 # If /usr/local/share/perl5 is not already in @INC, add it to PERL5LIB
-perl -e "print \"@INC\"" | egrep "(^|\W)/usr/local/share/perl5($| )" > /dev/null
+perl -e "print \"@INC\"" | grep -E "(^|\W)/usr/local/share/perl5($| )" > /dev/null
 if [ \$? = 1 ]; then
     setenv PERL5LIB /usr/local/share/perl5:\${PERL5LIB}
 fi
@@ -351,13 +351,13 @@ EOF
 chmod 755 /etc/profile.d/xcat.*
 
 %else
-if ! egrep PERL5LIB /etc/environment > /dev/null 2>&1 ; then
+if ! grep -E PERL5LIB /etc/environment > /dev/null 2>&1 ; then
 echo "
 # xCAT Perl setup
 PERL5LIB=/usr/opt/perl5/lib/5.8.2:/usr/opt/perl5/lib/5.8.2/aix-thread-multi:/usr/opt/perl5/lib/site_perl/5.8.2:/usr/opt/perl5/lib/site_perl/5.8.2/aix-thread-multi " >>/etc/environment
 fi
 
-if ! egrep XCATROOT /etc/environment > /dev/null 2>&1 ; then
+if ! grep -E XCATROOT /etc/environment > /dev/null 2>&1 ; then
 echo "
 # xCAT setup
 XCATROOT=$RPM_INSTALL_PREFIX0
@@ -366,7 +366,7 @@ MANPATH=\$XCATROOT/share/man:\$MANPATH
 " >> /etc/environment
 fi
 
-if ! egrep XCATROOT /etc/profile  > /dev/null 2>&1 ; then
+if ! grep -E XCATROOT /etc/profile  > /dev/null 2>&1 ; then
 echo "
 # xCAT setup
 XCATROOT=$RPM_INSTALL_PREFIX0
diff --git a/xCAT-server/xCAT-server.spec b/xCAT-server/xCAT-server.spec
index 7964094ca..545020251 100644
--- a/xCAT-server/xCAT-server.spec
+++ b/xCAT-server/xCAT-server.spec
@@ -489,19 +489,19 @@ fi
 %endif
 
 #Apply the correct httpd/apache configuration file according to the httpd/apache version
-if [ -n "$(httpd -v 2>&1 |grep -e '^Server version\s*:.*\/2.4')" ]
+if [ -n "$(httpd -v 2>&1 |grep -e '^Server version\s*:.*/2\.4')" ]
 then
    rm -rf /etc/httpd/conf.d/xcat-ws.conf
    cp /etc/%httpconfigdir/conf.orig/xcat-ws.conf.apache24 /etc/httpd/conf.d/xcat-ws.conf
 fi
 
-if [ -n "$(apachectl -v 2>&1 |grep -e '^Server version\s*:.*\/2.4')" ]
+if [ -n "$(apachectl -v 2>&1 |grep -e '^Server version\s*:.*/2\.4')" ]
 then
    rm -rf /etc/apache2/conf.d/xcat-ws.conf
    cp /etc/%httpconfigdir/conf.orig/xcat-ws.conf.apache24 /etc/apache2/conf.d/xcat-ws.conf
 fi
 
-if [ -n "$(apache2ctl -v 2>&1 |grep -e '^Server version\s*:.*\/2.4')" ]
+if [ -n "$(apache2ctl -v 2>&1 |grep -e '^Server version\s*:.*/2\.4')" ]
 then
    rm -rf /etc/apache2/conf.d/xcat-ws.conf
    cp /etc/%httpconfigdir/conf.orig/xcat-ws.conf.apache24 /etc/apache2/conf.d/xcat-ws.conf