What is PCPU Linux?
The JCPU time is the time used by all processes attached to the tty. It does not include past background jobs but does include currently running background jobs. The PCPU time is the time used by the current process, named in the “what” field.
What does w show in Linux?
w displays information about the users currently on the machine, and their processes. The header shows, in this order, the current time, how long the system has been running, how many users are currently logged on, and the system load averages for the past 1, 5, and 15 minutes.
What is the finger command in Linux?
Finger command is a user information lookup command which gives details of all the users logged in. This tool is generally used by system administrators. It provides details like login name, user name, idle time, login time, and in some cases their email address even.
What is the difference between who and w?
who command is used to determine when the system has booted last time, a list of logged-in users, and the system’s current run level. w command displays user information like user id and activities on the system. It also gives the knowledge of the system’s running time along with the system load average.
What is Linux load average?
The load average is the average system load on a Linux server for a defined period of time. In other words, it is the CPU demand of a server that includes sum of the running and the waiting threads. These numbers are the averages of the system load over a period of one, five, and 15 minutes.
What does the w command display?
w is a command-line utility that displays information about currently logged in users and what each user is doing. It also gives information about how long the system has been running, the current time, and the system load average.
What is the difference between who and w command in Linux?
What is finger command in networking?
Finger is a program you use to find information about other users when you know their login name or their e-mail address.
What does Chfn do in Linux?
In Unix, the chfn (change finger) command updates the finger information field in your /etc/passwd entry. The contents of this field can vary among systems, but this field usually includes your name, your office and home addresses, and the phone numbers for both.
Who command in Linux?
The Linux “who” command lets you display the users currently logged in to your UNIX or Linux operating system. Whenever a user needs to know about how many users are using or are logged-in into a particular Linux-based operating system, he/she can use the “who” command to get that information.
Which is the best command to get CPU information on Linux?
9 Useful Commands to Get CPU Information on Linux 1. Get CPU Info Using cat Command 2. lscpu Command – Shows CPU Architecture Info 3. cpuid Command – Shows x86 CPU 4. dmidecode Command – Shows Linux Hardware Info 5. Inxi Tool – Shows Linux System Information 6. lshw Tool – List Hardware Configuration 7. hardinfo – Shows Hardware Info in GTK+ Window
What does jcpu and pcpu stand for in Linux?
JCPU – The JCPU time is the time used by all processes attached to the tty. PCPU – The PCPU time is the time used by the current process displayed in WHAT field. WHAT – The command line of USER’s current process.
How to get the model of the CPU in Linux?
The command lscpu prints CPU architecture information from sysfs and /proc/cpuinfo as shown below: The command cpuid dumps complete information about the CPU (s) collected from the CPUID instruction, and also discover the exact model of x86 CPU (s) from that information. Make sure to install it before running it.
How to define per CPU variables in Linux?
Per-CPU variables. After the kernel finishes the initialization process, we will have loaded N .data..percpu sections, where N is the number of CPUs, and the section used by the bootstrap processor will contain an uninitialized variable created with the DEFINE_PER_CPU macro.
