Ubuntu timezone - Daylight Saving Time

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# Check Time Zone Database (tzdata/zoneinfo)

# List Next Year

$ zdump -v /usr/share/zoneinfo/America/Sao_Paulo

# Filter 2018

$ zdump -v /usr/share/zoneinfo/America/Sao_Paulo | grep 2018

Use zdump to view the information

# If needed update tzdata package

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Cisco router password recovery

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1) Press Break on the terminal keyboard a couple of times after you see the message program load complete, entry point: 0x80008000, size: 0x6fdb4c in order to put the router into ROMMON. 2) Type confreg 0x2142 at the rommon 1> prompt in order to boot from Flash. This step bypasses the startup configuration where the passwords are stored. 3)  Type reset at the rommon 2> prompt. The router reboots, but ignores the saved configuration. 4)  Type no after each setup question, or press Ctrl-C in order to skip the initial setup procedure. 5)  Type enable at the Router> prompt. You are in enable mode and should see the Router# prompt. 6)  Type   configure memory   or copy startup-config running-config in order to copy the nonvolatile RAM (NVRAM) into memory. 7)  Type show running-config. The passwords (enable password, enable secret, vty, and console passwords) are in either an encrypted or encrypted format. You can reuse ir change. 8)  Type configure terminal. The hostname (conf
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