diff --git a/usr/libexec/security-misc/pam-info b/usr/libexec/security-misc/pam-info
index 8998641..49b376c 100755
--- a/usr/libexec/security-misc/pam-info
+++ b/usr/libexec/security-misc/pam-info
@@ -42,7 +42,7 @@ if [ ! "$grep_result" = "" ]; then
    ## Yes, grep matched.
 
    ## Check if not out commented.
-   if ! echo "$grep_result" | grep --quiet -- "#" ; then
+   if ! printf '%s\n' "$grep_result" | grep --quiet -- "#" ; then
       ## Not out commented indeed.
 
       ## https://forums.whonix.org/t/etc-security-hardening-console-lockdown/8592
@@ -55,7 +55,7 @@ if [ ! "$grep_result" = "" ]; then
       fi
 
       if [ ! "$console_allowed" = "true" ]; then
-         echo "\
+         printf '%s\n' "\
 $0: ERROR: PAM_USER: '$PAM_USER' is not a member of group 'console'
 To unlock, run the following command as superuser:
 (If you still have a sudo/root shell somewhere.)
@@ -76,7 +76,7 @@ if [ "$PAM_USER" = 'sysmaint' ]; then
    sysmaint_passwd_info="$(passwd --status sysmaint 2>/dev/null)" || true
    sysmaint_lock_info="$(cut -d' ' -f2 <<< "${sysmaint_passwd_info}")"
    if [ "${sysmaint_lock_info}" = 'L' ]; then
-      echo "$0: ERROR: Reboot and choose 'PERSISTENT Mode - SYSMAINT Session' for system maintenance. See https://www.kicksecure.com/wiki/Sysmaint"
+      printf '%s\n' "$0: ERROR: Reboot and choose 'PERSISTENT Mode - SYSMAINT Session' for system maintenance. See https://www.kicksecure.com/wiki/Sysmaint"
    fi
 fi
 
@@ -84,7 +84,7 @@ kernel_cmdline="$(cat /proc/cmdline)"
 
 if [ "$PAM_USER" != 'sysmaint' ] \
    && [[ "${kernel_cmdline}" =~ 'boot-role=sysmaint' ]]; then
-   echo "$0: WARNING: Use account 'sysmaint' for system maintenance. See https://www.kicksecure.com/wiki/Sysmaint"
+   printf '%s\n' "$0: WARNING: Use account 'sysmaint' for system maintenance. See https://www.kicksecure.com/wiki/Sysmaint"
 fi
 
 ## https://forums.whonix.org/t/how-strong-do-linux-user-account-passwords-have-to-be-when-using-full-disk-encryption-fde-too/7698
@@ -95,7 +95,7 @@ fi
 #    if [ -f /etc/securetty ]; then
 #       grep_result="$(grep "^[^#]" /etc/securetty)"
 #       if [ "$grep_result" = "" ]; then
-#          echo "\
+#          printf '%s\n' "\
 # $0: ERROR: Root login is disabled.
 # ERROR: This is because /etc/securetty is empty.
 # See also:
@@ -143,7 +143,7 @@ fi
 ## Usage: faillock [--dir /path/to/tally-directory] [--user username] [--reset]
 
 ## Get first line.
-#pam_faillock_output_first_line="$(echo "$pam_faillock_output" | head --lines=1)"
+#pam_faillock_output_first_line="$(printf '%s\n' "$pam_faillock_output" | head --lines=1)"
 while read -t 10 -r pam_faillock_output_first_line ; do
    break
 done <<< "$pam_faillock_output"
@@ -152,12 +152,12 @@ true "pam_faillock_output_first_line: '$pam_faillock_output_first_line'"
 ## example pam_faillock_output_first_line:
 ## user:
 
-user_name="$(echo "$pam_faillock_output_first_line" | str_replace ":" "")"
+user_name="$(printf '%s\n' "$pam_faillock_output_first_line" | str_replace ":" "")"
 ## example user_name:
 ## user
 ## root
 
-pam_faillock_output_count="$(echo "$pam_faillock_output" | wc -l)"
+pam_faillock_output_count="$(printf '%s\n' "$pam_faillock_output" | wc -l)"
 ## example pam_faillock_output_count:
 ## 2
 ## example pam_faillock_output_count:
@@ -186,13 +186,13 @@ deny=3
 
 if test -f /etc/security/faillock.conf ; then
    deny_line=$(grep --invert-match "#" -- /etc/security/faillock.conf | grep -- "deny =")
-   deny="$(echo "$deny_line" | str_replace "=" "" | str_replace "deny" "" | str_replace " " "")"
+   deny="$(printf '%s\n' "$deny_line" | str_replace "=" "" | str_replace "deny" "" | str_replace " " "")"
    ## Example:
    #deny=50
 fi
 
 if [[ "$deny" == *[!0-9]* ]]; then
-   echo "\
+   printf '%s\n' "\
 $0: ERROR: deny is not numeric. deny: '$deny'
 ERROR: Please report this bug.
 " >&2
@@ -202,7 +202,7 @@ fi
 remaining_attempts="$(( $deny - $failed_login_counter ))"
 
 if [ "$remaining_attempts" -le "0" ]; then
-   echo "\
+   printf '%s\n' "\
 $0: ERROR: Login blocked after $failed_login_counter attempts.
 To unlock, run the following command as superuser:
 (If you still have a sudo/root shell somewhere.)
@@ -217,14 +217,14 @@ https://www.kicksecure.com/wiki/root#unlock
    exit 0
 fi
 
-echo "\
+printf '%s\n' "\
 $0: WARNING: $failed_login_counter failed login attempts for user_name '$user_name'.
 Login will be blocked after $deny attempts.
 You have $remaining_attempts more attempts before unlock procedure is required.
 " >&2
 
 if [ "$PAM_SERVICE" = "su" ]; then
-   echo "\
+   printf '%s\n' "\
 $0: NOTE: Type the password. When entering the password, no password feedback (no asterisk (\"*\") symbol) will be shown.
 " >&2
 fi