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What is the difference in conditional control statement of Linux shell and C?
Almost everything. C: if (expression) statement else statement Shell: if COMMANDS then COMMANDS else COMMANDS fi Note: these parts can be separated with semicolon as well, eg: if test x"$SHELL" = x"/bin/bash"; then echo 'Bash'; else echo 'Other'; fi
What is difference between echo and ' ' in unix?
Echo is a program. '' is not a program. '' does not perform any action. Echo returns what you type. '' does not.
What is the difference between sonar and echo location?
Sonar location is in the water and echo location is in the air.
What command of the Autoexecbat file turns on and off the displaying of commands and messages?
echo on echo off
What is echo cat in Linux?
Any word typed in a terminal after echo is printed to the screen. Therefore, echo cat simply prints cat.
What is meaning of echo off?
In a command prompt or script, "echo off" is a command that disables the echoing of commands being executed to the console. This means that any commands or output will not be displayed while the script or commands are running.
What is the difference between internal and external command?
Internal commands are the commands that are executed <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /> directly by the shell. These commands will not have a separate process running for each. External commands are the commands that are executed by the kernal. These commands will have a process id running for it. Internal commands are stored in the cmd.exe command interpreter, ex. Dir External commands correspond to a .com or .cmd file, ex.
What command prints text to the screen in Linux?
echo "This is my text."
What command do you type in Linux to determine the shell you are using?
echo $SHELL
What is the difference between rem and echo in batch?
rem is a comment that is only seen if you edit the batch echo actually is printed when the batch is running
How do you reverse string in linux?
With program tac. ExampleVALUE="ABC DEF"REV=$(echo "$VALUE" | tac)echo "$VALUE" "-->" "$REV"
Is there a timer command for the Linux terminal?
Use "man time" in a Linux terminal (without the quotes) to view the manual page for time. There are commands to show elapsed time a program runs, when a program is to start, etc. For a simple example, this 'Egg Timer' command: echo -e '\a' >&2; sleep 180; echo -e '\a' >72 will show a blank terminal for 180 seconds. Or 3 minutes, (which is enough to cook a soft-boiled egg!).
