Add troubleshooting advice to pacman-essentials.md

The two mentioned errors are quite common when working with Arch Linux.

1 files changed, 12 insertions, 0 deletions

diff --git a/content/articles/pacman-essentials.md b/content/articles/pacman-essentials.md
index 42c84dc..885cb1c 100644
--- a/content/articles/pacman-essentials.md
+++ b/content/articles/pacman-essentials.md
@@ -25,6 +25,15 @@ It runs interactively which means that questions should be answered by the user
 with pressing `y` or `n` followed by the `Enter` key. The default option (the
 bigger letter in `[Y/n]` or `[y/N]`) is a good option in most cases.
 
+If this fails because of errors related to signing keys and GPG it can be fixed
+by running this command:
+
+```
+sudo pacman -Sy archlinux-keyring && sudo pacman -Su
+```
+
+This error can be avoided by updating the system regularly.
+
 #### Package search
 
 One can search for existing packages with this command:
@@ -51,6 +60,9 @@ sudo pacman -S <package>
 `<package>` should be replaced by the lower case package name found with the
 package search (see above) like `firefox` or `gimp`.
 
+If this fails because the packages cannot be retrieved via the HTTP protocol
+the error can be fixed by updating the whole system first as described above.
+
 #### Package removal
 
 The recommended command to remove one or multiple packages is: