diff --git a/cmd/bent/scripts/benchdwarf b/cmd/bent/scripts/benchdwarf
index dbe15a1..c6d4e93 100755
--- a/cmd/bent/scripts/benchdwarf
+++ b/cmd/bent/scripts/benchdwarf
@@ -52,15 +52,15 @@ if [ ${bench} = "yes" ] ; then
 	echo "goos: $GOOS"
 	echo "goarch: $GOARCH"
 	echo "pkg:" # Erase any inherited pkg if files are concatenated
-    if echo $inputsquality | egrep -q '[.0-9]+' ; then
+    if echo $inputsquality | grep -E -q '[.0-9]+' ; then
     	echo Unit inputs-quality assume=exact
 		echo "Benchmark${2}_dwarf_input_goodness" 1 ${inputsquality} inputs-quality
 	fi
-    if echo $argsquality | egrep -q '[.0-9]+' ; then
+    if echo $argsquality | grep -E -q '[.0-9]+' ; then
     	echo Unit args-quality assume=exact
 		echo "Benchmark${2}_dwarf_args_goodness" 1 ${argsquality} args-quality
 	fi
-    if echo $stmtquality | egrep -q '[.0-9]+' ; then
+    if echo $stmtquality | grep -E -q '[.0-9]+' ; then
     	echo Unit stmts-quality assume=exact
 		echo "Benchmark${2}_dwarf_stmt_goodness" 1 ${stmtquality} stmts-quality
 		# echo "Benchmark${2}_dwarf_stmt_goodness_kind" 1 ${stmtkindquality} stmts-quality
diff --git a/cmd/bent/scripts/benchsize b/cmd/bent/scripts/benchsize
index d987b12..3f84440 100755
--- a/cmd/bent/scripts/benchsize
+++ b/cmd/bent/scripts/benchsize
@@ -17,12 +17,12 @@ fi
 
 
 # note total is different -- always $2
-total=`egrep -i '^total' $tmp | awk -Wposix '{print $2}'`
+total=`grep -E -i '^total' $tmp | awk -Wposix '{print $2}'`
 
-text=`egrep [^a-z]text[^a-z] $tmp | awk -Wposix "$awkcommand"`
+text=`grep -E [^a-z]text[^a-z] $tmp | awk -Wposix "$awkcommand"`
 gopclntab=`grep gopclntab $tmp | awk -Wposix "$awkcommand"`
 rodata=`grep rodata $tmp | awk -Wposix "$awkcommand"`
-data=`egrep [^a-z]data[^a-z._] $tmp | awk -Wposix "$awkcommand"`
+data=`grep -E [^a-z]data[^a-z._] $tmp | awk -Wposix "$awkcommand"`
 
 zdebug_info=`grep zdebug_info $tmp | awk -Wposix "$awkcommand"`
 zdebug_loc=`grep zdebug_loc $tmp | awk -Wposix "$awkcommand"`
@@ -46,34 +46,34 @@ echo "goos: $GOOS"
 echo "goarch: $GOARCH"
 echo "pkg:" # Erase any inherited pkg if files are concatenated
 
-if echo $total | egrep -q '[0-9]+' ; then
+if echo $total | grep -E -q '[0-9]+' ; then
 	echo Unit total-bytes assume=exact
 	echo "Benchmark${2}_total" 1 ${total} total-bytes
 fi
 
-if echo $text | egrep -q '[0-9]+' ; then
+if echo $text | grep -E -q '[0-9]+' ; then
 	echo Unit text-bytes assume=exact
 	echo "Benchmark${2}_text" 1 ${text} text-bytes
 fi
 
-if echo $data | egrep -q '[0-9]+' ; then
+if echo $data | grep -E -q '[0-9]+' ; then
 	echo Unit data-bytes assume=exact
 	echo "Benchmark${2}_data" 1 ${data} data-bytes
 fi
 
-if echo $rodata | egrep -q '[0-9]+' ; then
+if echo $rodata | grep -E -q '[0-9]+' ; then
 	echo Unit rodata-bytes assume=exact
 	echo "Benchmark${2}_rodata" 1 ${rodata} rodata-bytes
 fi
 
-if echo $gopclntab | egrep -q '[0-9]+' ; then
+if echo $gopclntab | grep -E -q '[0-9]+' ; then
 	echo Unit pclntab-bytes assume=exact
 	echo "Benchmark${2}_pclntab" 1 ${gopclntab} pclntab-bytes
 fi
 
 zdebug=`expr ${zdebug_info} + ${zdebug_loc} + ${zdebug_line} + ${zdebug_ranges} + ${zdebug_frame} + ${zdebug_abbrev} + ${zdebug_pubname} + ${zdebug_pubtype}`
 
-if echo $zdebug | egrep -q '[0-9]+' ; then
+if echo $zdebug | grep -E -q '[0-9]+' ; then
 	echo Unit zdebug-bytes assume=exact
 	echo "Benchmark${2}_zdebug_total" 1 ${zdebug} zdebug-bytes
 fi
diff --git a/cmd/bent/scripts/cmpcl.sh b/cmd/bent/scripts/cmpcl.sh
index be5cb73..9376001 100755
--- a/cmd/bent/scripts/cmpcl.sh
+++ b/cmd/bent/scripts/cmpcl.sh
@@ -104,8 +104,8 @@ newlog="new-${newtag}"
 
 cat ${RUN}.Old.build > ${oldlog}
 cat ${RUN}.New.build > ${newlog}
-egrep '^(Benchmark|[-_a-zA-Z0-9]+:)' ${RUN}.Old.stdout >> ${oldlog}
-egrep '^(Benchmark|[-_a-zA-Z0-9]+:)' ${RUN}.New.stdout >> ${newlog}
+grep -E '^(Benchmark|[-_a-zA-Z0-9]+:)' ${RUN}.Old.stdout >> ${oldlog}
+grep -E '^(Benchmark|[-_a-zA-Z0-9]+:)' ${RUN}.New.stdout >> ${newlog}
 cat ${RUN}.Old.{benchsize,benchdwarf} >> ${oldlog}
 cat ${RUN}.New.{benchsize,benchdwarf} >> ${newlog}
 benchsave -header "${STAMP}" "${oldlog}" "${newlog}"
diff --git a/cmd/bent/scripts/cmpjob.sh b/cmd/bent/scripts/cmpjob.sh
index b8fc8be..4157fd1 100755
--- a/cmd/bent/scripts/cmpjob.sh
+++ b/cmd/bent/scripts/cmpjob.sh
@@ -98,8 +98,8 @@ newlog="new-${newtag}"
 
 cat "${RUN}.Old.build" > "${oldlog}"
 cat "${RUN}.New.build" > "${newlog}"
-egrep '^(Benchmark|[-_a-zA-Z0-9]+:)' "${RUN}.Old.stdout" >> "${oldlog}"
-egrep '^(Benchmark|[-_a-zA-Z0-9]+:)' "${RUN}.New.stdout" >> "${newlog}"
+grep -E '^(Benchmark|[-_a-zA-Z0-9]+:)' "${RUN}.Old.stdout" >> "${oldlog}"
+grep -E '^(Benchmark|[-_a-zA-Z0-9]+:)' "${RUN}.New.stdout" >> "${newlog}"
 cat "${RUN}.Old.{benchsize,benchdwarf}" >> "${oldlog}"
 cat "${RUN}.New.{benchsize,benchdwarf}" >> "${newlog}"
 benchsave -header "${STAMP}" "${oldlog}" "${newlog}"
diff --git a/cmd/bent/scripts/cronjob.sh b/cmd/bent/scripts/cronjob.sh
index 3fc2e16..4c4e42c 100755
--- a/cmd/bent/scripts/cronjob.sh
+++ b/cmd/bent/scripts/cronjob.sh
@@ -120,8 +120,8 @@ cp ${STAMP} ${tip}-opt.${SFX}
 
 cat ${RUN}.Base.build >> ${BASE}-opt.${SFX}
 cat ${RUN}.Tip.build >> ${tip}-opt.${SFX}
-egrep '^(Benchmark|[-_a-zA-Z0-9]+:)' ${RUN}.Base.stdout >> ${BASE}-opt.${SFX}
-egrep '^(Benchmark|[-_a-zA-Z0-9]+:)' ${RUN}.Tip.stdout >> ${tip}-opt.${SFX}
+grep -E '^(Benchmark|[-_a-zA-Z0-9]+:)' ${RUN}.Base.stdout >> ${BASE}-opt.${SFX}
+grep -E '^(Benchmark|[-_a-zA-Z0-9]+:)' ${RUN}.Tip.stdout >> ${tip}-opt.${SFX}
 cat ${RUN}.Base.{benchsize,benchdwarf} >> ${BASE}-opt.${SFX}
 cat ${RUN}.Tip.{benchsize,benchdwarf} >> ${tip}-opt.${SFX}
 benchsave ${BASE}-opt.${SFX} ${tip}-opt.${SFX}
@@ -167,8 +167,8 @@ cp ${STAMP} ${tip}-Nl.${SFX}
 
 cat ${RUN}.BaseNl.build >> ${BASE}-Nl.${SFX}
 cat ${RUN}.TipNl.build >> ${tip}-Nl.${SFX}
-egrep '^(Benchmark|[-_a-zA-Z0-9]+:)' ${RUN}.BaseNl.stdout >> ${BASE}-Nl.${SFX}
-egrep '^(Benchmark|[-_a-zA-Z0-9]+:)' ${RUN}.TipNl.stdout >> ${tip}-Nl.${SFX}
+grep -E '^(Benchmark|[-_a-zA-Z0-9]+:)' ${RUN}.BaseNl.stdout >> ${BASE}-Nl.${SFX}
+grep -E '^(Benchmark|[-_a-zA-Z0-9]+:)' ${RUN}.TipNl.stdout >> ${tip}-Nl.${SFX}
 cat ${RUN}.BaseNl.{benchsize,benchdwarf} >> ${BASE}-Nl.${SFX}
 cat ${RUN}.TipNl.{benchsize,benchdwarf} >> ${tip}-Nl.${SFX}
 benchsave ${BASE}-Nl.${SFX} ${tip}-Nl.${SFX}
@@ -204,8 +204,8 @@ cp ${STAMP} ${tip}-l.${SFX}
 
 cat ${RUN}.Basel.build >> ${BASE}-l.${SFX}
 cat ${RUN}.Tipl.build >> ${tip}-l.${SFX}
-egrep '^(Benchmark|[-_a-zA-Z0-9]+:)' ${RUN}.Basel.stdout >> ${BASE}-l.${SFX}
-egrep '^(Benchmark|[-_a-zA-Z0-9]+:)' ${RUN}.Tipl.stdout >> ${tip}-l.${SFX}
+grep -E '^(Benchmark|[-_a-zA-Z0-9]+:)' ${RUN}.Basel.stdout >> ${BASE}-l.${SFX}
+grep -E '^(Benchmark|[-_a-zA-Z0-9]+:)' ${RUN}.Tipl.stdout >> ${tip}-l.${SFX}
 cat ${RUN}.Basel.{benchsize,benchdwarf} >> ${BASE}-l.${SFX}
 cat ${RUN}.Tipl.{benchsize,benchdwarf} >> ${tip}-l.${SFX}
 benchsave ${BASE}-l.${SFX} ${tip}-l.${SFX}