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ccna 200 301 voucher.74 -rw-3159 Feb 12 2013 22:17:00 +00:00temp-copy-of-config7783804928 ytestotal(7685111808bytesfree)Rl#.In addition to copying files, you can also delete some of them. For example, IOS supports three different commands to erase the startup-config file from NVRAM. The write erase and erase startup-config commands are older, while the erase nvram: command is newer and we tend to use this command.Note that Cisco IOS does not have a command to erase the contents of the running-config file. To clear the contents of the running-config file, simply delete the startup-config file and reload the router. Tip: Copying all current router configurations should be part of any overall network backup and security strategy. Keeping a backup of these configurations allows you to recover from any missteps and attacks that change the configuration.Note one final point about config file names: While most people can use the common names startup-config and, running-config, Cisco I0S has defined some more formatted names for these files. These more formatted names use the format defined by the Cisco IOS File System (IFS), which is the name of the file system created by Cisco I0S to manage files. For example, the copy command renames the startup-config file name to nvram:startup-config0 Table 20-5 lists the alternative names for these two configuration files.Table 20-5 IFS File Names for the startup and running config FilesCommon names for config files Alternative namesstartup-config nvram: startup-configrunning-config system: running-config