diff --git a/disk-check.sh b/disk-check.sh
index 82564f7..b418b45 100644
--- a/disk-check.sh
+++ b/disk-check.sh
@@ -9,9 +9,17 @@ echo "Starting disk space report... This may take a few minutes." > $OUTPUT_FILE
 estimate_package_cache_size() {
     echo "Estimating the size of the package cache:" >> $OUTPUT_FILE
     if [[ $OS == "Linux" ]]; then
-        sudo du -sh /var/cache/apt 2>/dev/null >> $OUTPUT_FILE || echo "Error estimating apt cache size." >> $OUTPUT_FILE
+        if [[ -d /var/cache/apt ]]; then
+            sudo du -sh /var/cache/apt 2>>$OUTPUT_FILE >> $OUTPUT_FILE || echo "Error estimating apt cache size." >> $OUTPUT_FILE
+        else
+            echo "/var/cache/apt directory not found." >> $OUTPUT_FILE
+        fi
     elif [[ $OS == "FreeBSD" ]]; then
-        sudo du -sh /var/cache/pkg 2>/dev/null >> $OUTPUT_FILE || echo "Error estimating pkg cache size." >> $OUTPUT_FILE
+        if [[ -d /var/cache/pkg ]]; then
+            sudo du -sh /var/cache/pkg 2>>$OUTPUT_FILE >> $OUTPUT_FILE || echo "Error estimating pkg cache size." >> $OUTPUT_FILE
+        else
+            echo "/var/cache/pkg directory not found." >> $OUTPUT_FILE
+        fi
     fi
     echo >> $OUTPUT_FILE
 }
@@ -20,9 +28,17 @@ estimate_package_cache_size() {
 estimate_old_packages_size() {
     echo "Estimating the size of old package files:" >> $OUTPUT_FILE
     if [[ $OS == "Linux" ]]; then
-        sudo du -sh /var/lib/apt/lists /var/lib/apt/lists/partial 2>/dev/null >> $OUTPUT_FILE || echo "Error estimating old packages size." >> $OUTPUT_FILE
+        if [[ -d /var/lib/apt/lists ]]; then
+            sudo du -sh /var/lib/apt/lists /var/lib/apt/lists/partial 2>>$OUTPUT_FILE >> $OUTPUT_FILE || echo "Error estimating old packages size." >> $OUTPUT_FILE
+        else
+            echo "/var/lib/apt/lists directory not found." >> $OUTPUT_FILE
+        fi
     elif [[ $OS == "FreeBSD" ]]; then
-        sudo du -sh /var/db/pkg 2>/dev/null >> $OUTPUT_FILE || echo "Error estimating old packages size." >> $OUTPUT_FILE
+        if [[ -d /var/db/pkg ]]; then
+            sudo du -sh /var/db/pkg 2>>$OUTPUT_FILE >> $OUTPUT_FILE || echo "Error estimating old packages size." >> $OUTPUT_FILE
+        else
+            echo "/var/db/pkg directory not found." >> $OUTPUT_FILE
+        fi
     fi
     echo >> $OUTPUT_FILE
 }
@@ -31,9 +47,17 @@ estimate_old_packages_size() {
 estimate_log_size() {
     echo "Estimating the size of system logs:" >> $OUTPUT_FILE
     if [[ $OS == "Linux" ]]; then
-        sudo journalctl --disk-usage 2>/dev/null >> $OUTPUT_FILE || echo "Error estimating journal log size." >> $OUTPUT_FILE
+        if command -v journalctl &>/dev/null; then
+            sudo journalctl --disk-usage 2>>$OUTPUT_FILE >> $OUTPUT_FILE || echo "Error estimating journal log size." >> $OUTPUT_FILE
+        else
+            echo "journalctl command not found on Linux." >> $OUTPUT_FILE
+        fi
     elif [[ $OS == "FreeBSD" ]]; then
-        sudo du -sh /var/log 2>/dev/null >> $OUTPUT_FILE || echo "Error estimating log size in /var/log." >> $OUTPUT_FILE
+        if [[ -d /var/log ]]; then
+            sudo du -sh /var/log 2>>$OUTPUT_FILE >> $OUTPUT_FILE || echo "Error estimating log size in /var/log." >> $OUTPUT_FILE
+        else
+            echo "/var/log directory not found." >> $OUTPUT_FILE
+        fi
     fi
     echo >> $OUTPUT_FILE
 }
@@ -41,7 +65,11 @@ estimate_log_size() {
 # Function to estimate the size of temporary files
 estimate_tmp_size() {
     echo "Estimating the size of temporary files:" >> $OUTPUT_FILE
-    sudo du -sh /tmp /var/tmp 2>/dev/null >> $OUTPUT_FILE || echo "Error estimating temporary files size." >> $OUTPUT_FILE
+    if [[ -d /tmp && -d /var/tmp ]]; then
+        sudo du -sh /tmp /var/tmp 2>>$OUTPUT_FILE >> $OUTPUT_FILE || echo "Error estimating temporary files size." >> $OUTPUT_FILE
+    else
+        echo "/tmp or /var/tmp directories not found." >> $OUTPUT_FILE
+    fi
     echo >> $OUTPUT_FILE
 }
 
@@ -49,8 +77,12 @@ estimate_tmp_size() {
 list_large_directories() {
     local directory=$1
     echo "Scanning $directory for large directories..." >> $OUTPUT_FILE
-    sudo du -ah $directory 2>/dev/null | sort -hr > /tmp/du_output.txt || echo "Error scanning directories in $directory." >> $OUTPUT_FILE
-    cat /tmp/du_output.txt >> $OUTPUT_FILE
+    if [[ -d $directory ]]; then
+        sudo du -ah $directory 2>/dev/null | sort -hr > /tmp/du_output.txt || echo "Error scanning directories in $directory." >> $OUTPUT_FILE
+        cat /tmp/du_output.txt >> $OUTPUT_FILE
+    else
+        echo "$directory directory not found." >> $OUTPUT_FILE
+    fi
     echo >> $OUTPUT_FILE
 }