diff --git a/src/install.sh b/src/install.sh
index ac96d5b..cd8bb53 100644
--- a/src/install.sh
+++ b/src/install.sh
@@ -254,7 +254,7 @@ if ! touch "$SYSTEM"; then
   error "Could not create file $SYSTEM for the system disk." && exit 98
 fi
 
-! setOwner "$SYSTEM" && warn "failed to set the owner for \"$SYSTEM\" !"
+setOwner "$SYSTEM" || warn "failed to set the owner for \"$SYSTEM\" !"
 
 if [[ "${FS,,}" == "btrfs" ]]; then
   { chattr +C "$SYSTEM"; } || :
@@ -329,7 +329,7 @@ fakeroot -- bash -c "set -Eeu;\
 
 rm -rf "$MOUNT"
 echo "$BASE" > "$STORAGE/dsm.ver"
-! setOwner "$STORAGE/dsm.ver" && warn "failed to set the owner for \"$STORAGE/dsm.ver\" !"
+setOwner "$STORAGE/dsm.ver" || warn "failed to set the owner for \"$STORAGE/dsm.ver\" !"
 
 if [[ "$URL" == "file://$STORAGE/$BASE.pat" ]]; then
   rm -f "$PAT"
@@ -338,11 +338,11 @@ else
 fi
 
 if [ -f "$STORAGE/$BASE.pat" ]; then
-  ! setOwner "$STORAGE/$BASE.pat" && warn "failed to set the owner for \"$STORAGE/$BASE.pat\" !"
+  setOwner "$STORAGE/$BASE.pat" || warn "failed to set the owner for \"$STORAGE/$BASE.pat\" !"
 fi
 
 mv -f "$BOOT" "$STORAGE/$BASE.boot.img"
-! setOwner "$STORAGE/$BASE.boot.img" && warn "failed to set the owner for \"$STORAGE/$BASE.boot.img\" !"
+setOwner "$STORAGE/$BASE.boot.img" || warn "failed to set the owner for \"$STORAGE/$BASE.boot.img\" !"
 
 rm -rf "$TMP"
 
diff --git a/src/power.sh b/src/power.sh
index 25b17fb..c700bc0 100644
--- a/src/power.sh
+++ b/src/power.sh
@@ -108,8 +108,8 @@ forceKillQemu() {
   local reason="$1"
   local pid display
 
-  ! readQemuPid pid && return 0
-  ! isAlive "$pid" && return 0
+  readQemuPid pid || return 0
+  isAlive "$pid" || return 0
 
   display=$(displayReason "$reason")
   error "Forcefully terminating $(app), reason: $display..."
@@ -305,7 +305,7 @@ waitForShutdown() {
     local slp=$!
 
     # Stop waiting if the process has exited
-    ! isAlive "$pid" && break
+    isAlive "$pid" || break
 
     # Workaround for stale/zombie QEMU pid file
     [ ! -s "$QEMU_START_PID" ] && [ ! -s "$QEMU_PID" ] && break
@@ -372,7 +372,7 @@ graceful_shutdown() {
   finish "$code"
 }
 
-! enabled "$SHUTDOWN" && return 0
+enabled "$SHUTDOWN" || return 0
 [ -n "${QEMU_TIMEOUT:-}" ] && TIMEOUT="$QEMU_TIMEOUT"
 
 if interactive; then
diff --git a/src/proc.sh b/src/proc.sh
index dd5a1c3..555ee76 100644
--- a/src/proc.sh
+++ b/src/proc.sh
@@ -47,7 +47,7 @@ checkSse42() {
 
   if ! hasFlag "sse4_2"; then
     error "Your CPU does not have the SSE4 instruction set that Virtual DSM requires!"
-    ! enabled "$DEBUG" && exit 88
+    enabled "$DEBUG" || exit 88
   fi
 
   return 0
diff --git a/src/reset.sh b/src/reset.sh
index 3769d0b..4edca77 100644
--- a/src/reset.sh
+++ b/src/reset.sh
@@ -209,7 +209,7 @@ normalizeRamSize() {
     fi
 
     RAM_SIZE=$(echo "${RAM_SIZE^^}" | sed 's/MB/M/g;s/GB/G/g;s/TB/T/g')
-    ! numfmt --from=iec "$RAM_SIZE" &>/dev/null && error "Invalid RAM_SIZE: $RAM_SIZE" && exit 16
+    numfmt --from=iec "$RAM_SIZE" &>/dev/null || { error "Invalid RAM_SIZE: $RAM_SIZE" && exit 16; }
     wanted=$(numfmt --from=iec "$RAM_SIZE")
     [ "$wanted" -lt "$RAM_MINIMUM" ] && error "RAM_SIZE is too low: $RAM_SIZE" && exit 16
 
@@ -254,7 +254,7 @@ checkKvm() {
           fi
           if ! grep -qw "sse4_2" <<< "$flags"; then
             error "Your CPU does not have the SSE4 instruction set that Virtual DSM requires!"
-            ! enabled "$DEBUG" && exit 88
+            enabled "$DEBUG" || exit 88
           fi
         fi
       fi
@@ -275,7 +275,7 @@ checkKvm() {
             error "KVM acceleration is not available $KVM_ERR, this will cause the machine to run about 10 times slower."
             error "See the FAQ for possible causes, or disable acceleration by adding the \"KVM=N\" variable (not recommended)." ;;
         esac
-        ! enabled "$DEBUG" && exit 88
+        enabled "$DEBUG" || exit 88
       fi
     fi
 
diff --git a/src/utils.sh b/src/utils.sh
index eadf61c..3b2723d 100644
--- a/src/utils.sh
+++ b/src/utils.sh
@@ -155,7 +155,7 @@ waitPidFile() {
   local timeout="${2:-10}"
   local deadline=$((SECONDS + timeout))
 
-  ! readPidFile pid "$file" && return 0
+  readPidFile pid "$file" || return 0
 
   while [ -s "$file" ] && isAlive "$pid"; do
     (( SECONDS >= deadline )) && return 1
@@ -218,7 +218,7 @@ sKill() {
   local pid
   local file="$1"
 
-  ! readPidFile pid "$file" && return 0
+  readPidFile pid "$file" || return 0
 
   if isAlive "$pid"; then
     { kill -15 -- "$pid" || :; } 2>/dev/null
@@ -256,7 +256,7 @@ setOwner() {
   uid=$(stat -c '%u' "$dir") || return 1
   gid=$(stat -c '%g' "$dir") || return 1
 
-  ! chown "$uid:$gid" "$file" && return 1
+  chown "$uid:$gid" "$file" || return 1
 
   return 0
 }
@@ -267,7 +267,7 @@ makeDir() {
   local dir uid gid
 
   [ -d "$path" ] && return 0
-  ! mkdir -p "$path" && return 1
+  mkdir -p "$path" || return 1
 
   dir=$(dirname -- "$path")