System Utility Commands

• date :
• uptime
• hostname
• uname
• which
• cal

• bc

• date

  • returns present date and time
• uptime
  • returns how long the system is running
  • number of users
  • load average
• hostname
  • returns the username
• uname
  • returns the OS
  • returns lot of information with different flags
• which
  • returns where any command resides
  • which pwd returns /usr/bin/date
• cal
  • returns calendar of present month
  • cal 9 1977 will return the calendar of 1977 for September.
  • cal 2016 will return calendar for all the months of 2016
• bc
  • stands for binary calculator