The 'uptime' command will tell you exactly how many users are on the system. There are other variations of this, including counting the number of words from the 'users' command, etc., but this is the easiest.
who | wc -l
You could also use the sequence:
users | wc -l
The easiest way is to run the 'uptime' command, which will give you that information on the first line.
Changes the permissions of a file or folder to grant or deny the ability to read, write, and/or execute the file for the current owner, the current group, or for all users of the system.
"msg" command might help. It pops up a message box on the users PC. C:/> msg <user_name> "Hello" "msg" command might help. It pops up a message box on the users PC. C:/> msg <user_name> "Hello"
feasiblity study, system design system instalation, users training, system operational and system maintenance
If the new system fails or malfunctions, the old system is still in operation and hence, there is little to no data loss. It allows the end-users to compare and evaluate the new system's efficiency against the old system. Any users that are new to the system can be trained gradually as the system is implemented.
system analyst
There are many ways to do this, but the fastest and easiest is to use the 'uptime' command, which will tell you in a summary line how many users are logged in.
There are a series of commands, depending on what and how much information you want on logged in users. The commands are: who w users finger (if installed)
Use the 'who', 'w', or 'users' command to find out who is logged in.
who command gives the list of users who have currently logged in......
The basic 'who' command lets you see the time of last system boot; list of users logged-in; the current run level, etc.
This has traditionally been a feature of multiuser operating system that the command the system operator uses to command a reboot or shutdown allows the system operator to specify this time interval, then automatically notifies all logged in users to complete what they are doing and log off before that time runs out. Any users failing to log out before the time specified by the system operator expires will be automatically logged out and their tasks killed at the last moment before the system automatically reboots.
users
The command "finger" can tell you how many active shells are used, the users logged in, and where they logged in.
The command is 'wall' (write all). In some systems it can only be executed by the administrator.
There are several commands depending on how much detail you want, and whether or not a certain package is installed on the system. The command 'who', 'w', 'users' will give varying degrees of information on who is logged in. The 'finger' command will also give some information but only if the finger software is installed.
A user may switch their identities when logged in using the 'su' command. On some systems the 'su' command may be restricted.
Wall is a utility that broadcasts a message to all virtual terminals on the system. It can be a way to send a message to all users logged onto a command line and (in the case of KDE 4) on the desktop.