What is PS3 in Linux?

From Wikipedia, the free encyclopedia. OtherOS was a feature available in early versions of the PlayStation 3 video game console that allowed user installed software, such as Linux or FreeBSD, to run on the system.

What is PS1 PS2 PS3 PS4 in Linux?

The default is “+ ”. So, PS1 is your normal “waiting for a command” prompt, PS2 is the continuation prompt that you saw after typing an incomplete command, PS3 is shown when the select command is waiting for input, and PS4 is the debugging trace line prefix.

What is PS3 in shell script?

PS3(Prompt String 3) is one of the Shell prompts available for Linux. … PS3 prompt is useful in shell scripts along with select command to provide a custom prompt for the user to select a value. When using select commands it’s better to use PS3 prompt to provide meaningful information to user.

What is PS2 in Unix?

PS2 – Continuation interactive prompt
A very long unix command can be broken down to multiple line by giving at the end of the line.

What is PS1 in Linux?

The command prompt and terminal appearance are governed by an environment variable called PS1 . According to the Bash man page, PS1 represents the primary prompt string which is displayed when the shell is ready to read a command.

Is PS2 Unix?

PS2(Prompt String 2) is one of the prompts available in Linux/Unix. The other prompts are PS1, PS3 and PS4. This is very much useful for entering a large command in multiple lines and when you execute incomplete command, this prompt will come into picture.

What is PS4 in bash?

$PS4. The $PS4 variable in Bash is used for the prompt printed before the command line is echoed when the debugging shell option -x is set with the set builtin command. … The first character of the $PS4 expanded value is replicated for each level of indirection.

What is bash set?

set is a shell builtin, used to set and unset shell options and positional parameters. Without arguments, set will print all shell variables (both environment variables and variables in current session) sorted in current locale. You can also read bash documentation.

How do you pause a Linux process?

First, find the pid of the running process using ps command. Then, pause it using kill -STOP , and then hibernate your system. Resume your system and resume the stopped process using command kill -CONT .

What is secondary prompt in Unix?

When you issue a command that is incomplete, the shell will display a secondary prompt and wait for you to complete the command and hit Enter again. The default secondary prompt is > (the greater than sign), but can be changed by re-defining the PS2 shell variable.

What is PS2 variable?

PS2: environment variable which contains the value the prompt used for a command continuation interpretation. You see it when you write a long command in many lines. … PS4: environment variable which contains the value of the prompt used to show script lines during the execution of a bash script in debug mode.

What does PS1 stand for?

Video gaming. PlayStation (console), video game console released by Sony in 1994.