scale defines how some operations use digits after the decimal point. The default value of scale is 0. ibase and obase define the conversion base for input and output numbers. The default for both input and output is base 10.
What is the use of BC command in Linux?
bc command is used for command line calculator. It is similar to basic calculator by using which we can do basic mathematical calculations. Arithmetic operations are the most basic in any kind of programming language.
What is scale in bash?
scale=4;1/16 sets four decimal places for decimal equivalent of the fraction 1/16. … bc implements base conversion—convert from one base number system to another.
What is Echo $$ in Linux?
echo command in linux is used to display line of text/string that are passed as an argument . This is a built in command that is mostly used in shell scripts and batch files to output status text to the screen or a file. Syntax : echo [option] [string]
What is the output of who command?
Explanation: who command output the details of the users who are currently logged in to the system. The output includes username, terminal name (on which they are logged in), date and time of their login etc. 11.
What do you understand by process in Linux?
Linux Processes Basics. In short, processes are running programs on your Linux host that perform operations such as writing to a disk, writing to a file, or running a web server for example. On the other hand, programs are lines or code or lines of machine instructions stored on a persistent data storage.
What does BC stand for?
Anno Domini
What is BC and DC?
What do they mean? AD is AFTER Jesus was born. BC is BEFORE Jesus was born. AD comes from Latin Anno Domini meaning “In the year of Our Lord” BC comes from Before Christ.
What is scale in shell script?
scale defines how some operations use digits after the decimal point. The default value of scale is 0. ibase and obase define the conversion base for input and output numbers. The default for both input and output is base 10. last (an extension) is a variable that has the value of the last printed number.
Who am I command in Linux?
whoami command is used both in Unix Operating System and as well as in Windows Operating System. It is basically the concatenation of the strings “who”,”am”,”i” as whoami. It displays the username of the current user when this command is invoked. It is similar as running the id command with the options -un.
What does BC mean in Linux?
bc (Basic Calculator) is a command line utility that offers everything you expect from a simple scientific or financial calculator. It is a language that supports arbitrary precision numbers with interactive execution of statements and it has syntax similar to that of C programming language.
Which option is used with TPUT command to set background color?
To change the color of the text, use the setb option for setting the background color and the setf option for setting the foreground color along with the number of the color assigned in the terminfo database.
How do I list all shells in Linux?
cat /etc/shells – List pathnames of valid login shells currently installed. grep “^$USER” /etc/passwd – Print the default shell name. The default shell runs when you open a terminal window. chsh -s /bin/ksh – Change the shell used from /bin/bash (default) to /bin/ksh for your account.
What does echo mean?
(Entry 1 of 4) 1a : the repetition of a sound caused by reflection of sound waves. b : the sound due to such reflection. 2a : a repetition or imitation of another : reflection.