WordPress errors after setting up a new installation on the server can include these:
Downloading update from https://wordpress.org/wordpress-3.0.1.zip
Unpacking the update
Could not create directory.: /public_html
Installation Failed
Downloading update from https://wordpress.org/wordpress-3.0.1.zip
Unpacking the update
Verifying the unpacked files
Installing the latest version
Could not copy file.: /public_html/wp-admin/css/theme-editor.dev.css
Installation Failed
They are generally permission based errors and can be resolved by changing permissions (CHMOD) of the following folders to 777:
In wp-content there are 4 folders (plugins, themes, upgrade, uploads).
You can use a decent FTP program for this. I use and recommend the free WINSCP from here:
https://winscp.net/
It’s very stable and supports FTP, SFTP and SCP.