pages*: add missing mnemonics (#12151)

* pages*: add missing mnemonics

---------

Co-authored-by: Sebastiaan Speck <12570668+sebastiaanspeck@users.noreply.github.com>
Co-authored-by: Lena <126529524+acuteenvy@users.noreply.github.com>
Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>

pages/common/certutil.md

@@ -3,7 +3,7 @@
 > Manage keys and certificates in both NSS databases and other NSS tokens.
 > More information: <https://manned.org/certutil>.
 
-- Create a new certificate database:
+- Create a [N]ew certificate database in the current [d]irectory:
 
 `certutil -N -d .`
 
@@ -11,14 +11,14 @@
 
 `certutil -L -d .`
 
-- List all private keys in a database:
+- List all private [K]eys in a database specifying the password [f]ile:
 
 `certutil -K -d . -f {{path/to/password_file.txt}}`
 
-- Import the signed certificate into the requesters database:
+- [A]dd the signed certificate to the requesters database specifying a [n]ickname, [t]rust attributes and an [i]nput CRT file:
 
 `certutil -A -n "{{server_certificate}}" -t ",," -i {{path/to/file.crt}} -d .`
 
-- Add subject alternative names to a given certificate:
+- Add subject alternative names to a given [c]ertificate with a specific key size ([g]):
 
 `certutil -S -f {{path/to/password_file.txt}} -d . -t ",," -c "{{server_certificate}}" -n "{{server_name}}" -g {{2048}} -s "CN={{common_name}},O={{organization}}"`