This pertains to the Webview series of Managed switches in the "Linksys By Cisco" line of Linksys products such as the Linksys SRW2024 of SRW248G4 switches. 

First you will need a serial cable.  This is NOT the same cable as the Cisco serial cable (which has DB9 serial on one end and RJ-45 ethernet on the other).  You will just need a straight serial cable and the Windows Hyperterminal application (installed by default on all versions of Windows).

Then power on the switch by plugging in the power cable (unfortunately there is no power switch).  Consider plugging the switch into a short power strip so you can quickly power cycle the unit.

You should see the boot sequence on your screen for the switch's serial interface.  Immediately after the phrase "step 2"  press the "Escape" key ONCE and only once.  This will interrupt the boot sequence and provide you with the ability to delete the password file on the next screen. 

WARNING: most internt help pages tell you to press the escape key after the promt says "Autoboot in 2 seconds - press RETURN or Esc. to abort and enter prom"  If you wait this long, it is too late! You must press the escape key BEFORE this message is displayed.

Also, many help pages say you have to hold down Ctrl-U inorder to interrupt the boot sequence.  I have not found this necessary for the two above models of Linksys switch I have serviced.

After resetting the password file, the switch will boot like normal.  You need to go into the user administration section and set the Admin password to waht you want.  The default is "admin" with ablank password.  Another good step is to choose the menu option that allows you to reset the switch to factory defaults.  This will turn on the embedded webserver and set the switch to the default address 192.168.1.254, which is sometimes faster than manually setting these settings individually.