pacman 补充强制安装命令

Signed-off-by: ithink.chan <chenyang@autoai.com>

Software/Application/Pacman/Pacman.md

@@ -2,16 +2,24 @@
 
 ## Search
 
-    pacman -Ss <key words>
+```sh
+pacman -Ss <key words>
+```
 
 ## Install
 
-    pacman -S <package name>
+```sh
+pacman -S <package name>
+# if error <file> exists in filesystem
+pacman -S <package name> --force
+```
 
 ## Remove
 
-    pacman -Rscun <package name>
-        -c, --cascade        remove packages and all packages that depend on them
-        -n, --nosave         remove configuration files
-        -s, --recursive      remove unnecessary dependencies
-        -u, --unneeded       remove unneeded packages
+```sh
+pacman -Rscun <package name>
+    -c, --cascade        remove packages and all packages that depend on them
+    -n, --nosave         remove configuration files
+    -s, --recursive      remove unnecessary dependencies
+    -u, --unneeded       remove unneeded packages
+```