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August 9th, 2024 1:15 PM Mr. Q Categories: Command

Command: uptime

The uptime command shows how long the system has been running since the last reboot, along with the current time, the number of users logged in, and the system’s load averages.

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Sample Commands and Outputs:

• uptime: Displays the system’s uptime, current time, number of users, and load averages. Sample Command and Output:

  $ uptime
  12:00:01 up 1 day,  3:45,  2 users,  load average: 0.15, 0.22, 0.18

Description:

• 12:00:01: The current time.
• up 1 day, 3:45: The system has been running for 1 day and 3 hours 45 minutes.
• 2 users: The number of users currently logged in.
• load average: 0.15, 0.22, 0.18: The system load averages over the last 1, 5, and 15 minutes.
• uptime -p: Displays the uptime in a “pretty” format. Sample Command and Output:

  $ uptime -p
  up for 1 day, 3 hours, 45 minutes

Description:

• -p: The option to show the uptime in a more human-readable format.
• uptime -s: Displays the system’s start time in ISO 8601 format. Sample Command and Output:

  $ uptime -s
  2024-08-08 08:15:32

Description:

• -s: The option to show the time when the system was last started.
• uptime -f: Shows the full format including the system’s uptime, the number of users, and the load averages in a detailed manner. Sample Command and Output:

  $ uptime -f
  12:00:01 up 1 day, 3 hours, 45 minutes, 2 users, load average: 0.15, 0.22, 0.18

Description:

• -f: The option to provide a more detailed output, including the full format of the uptime, number of users, and load averages.
• uptime -h: Displays help information for the uptime command. Sample Command and Output:

  $ uptime -h
  Usage: uptime [OPTION...]
  Show how long the system has been running.

  -p, --pretty   show uptime in a human-readable format
  -s, --since     show system start time
  -f, --full      show full format
  -h, --help      display this help message

Description:

• -h: The option to display help information, showing the available options and usage of the uptime command.

Note: The uptime command is essential for monitoring system performance and stability. The -h option is particularly useful for getting a quick reference on how to use the command and its available options.