Add new Linux commands

src/linux.md

@@ -218,4 +218,24 @@ chmod ugo+rwx file-or-directory
 
 # Only read to all.
 chmod a=r file-or-directory
+
+# View permissions.
+ls -l
+ls -ld
+```
+
+## Service logs
+```bash
+# View logs for a particular service.
+sudo journalctl -fu mycustom.service
+sudo journalctl -fu mycustom.service --since "1 hour ago"
+```
+
+## Copy files
+```bash
+# Copy a file to a directory.
+scp file-name.ext <user>@<server>:~/path/to/directory/
+
+# Copy the contents of a folder to a remote folder.
+scp -r .\path\to\directory\* <user>@<server>:/path/to/remove/directory
 ```