It means that it is a directory. The first mode field is the “special file” designator; regular files display as – (none). As for which possible letters could be there, on Linux the following exist: d (directory) … D (door, not common on Linux systems, but has been ported)
What is D command in Linux?
ls -d shows information about a directory or symbolic link – with this information being (in simple terms) its respective path. The logical assumption is that the d stands for directory, since it’s most basic definition in UNIX terminology I’ve come across is ‘lists directories’.
What is D in Terminal?
The D-Terminal or D-tanshi (Ｄ端子) is a type of analog video connector found on Japanese consumer electronics, typically HDTV, DVD, Blu-ray, D-VHS and HD DVD devices. … In appearance it is a small flat trapezic connector, the same connector as the AAUI connector used by Apple Computer for some time to connect to ethernet.
What is D in bash?
-d is a operator to test if the given directory exists or not. … This condition is true only when the directory exists. In our example, the directory exists so this condition is true. I am changing the directory variable to “/home/a/b/”.
What does F mean Linux?
Many Linux commands have an -f option, which stands for, you guessed it, force! Sometimes when you execute a command, it fails or prompts you for additional input. This may be an effort to protect the files you are trying to change or inform the user that a device is busy or a file already exists.
How do I list all directories in Linux?
Linux or UNIX-like system use the ls command to list files and directories. However, ls does not have an option to list only directories. You can use combination of ls command and grep command to list directory names only. You can use the find command too.
How do you get Ctrl-D?
If You press Ctrl-D then the terminal driver will send a SIGINT to the signal handler of the program. Note: pressing VINTR will erase the terminal input buffer so You can not read the characters typed in the line before the VINTR key pressed.
What does C mean in terminal?
In most terminals Ctrl + C (represented by ^C ) are used to halt the execution of a process, hence pasting with that short cut won’t work. For quick copying and pasting, you can utilize X’s primary buffer by highlighting whatever text you want to copy, and then middle-clicking where you want to paste it.
What does ls command stand for?
List
What is bash symbol?
Special bash characters and their meaning
| Special bash character | Meaning |
|---|---|
| # | # is used to comment a single line in bash script |
| $$ | $$ is used to reference process id of any command or bash script |
| $0 | $0 is used to get the name of the command in a bash script. |
| $name | $name will print the value of variable “name” defined in the script. |
What does C mean in Linux?
When called with -c command, it executes the Python statement(s) given as command. Here command may contain multiple statements separated by newlines. … the -c flag means execute the following command as interpreted by this program.
What does R mean in Linux?
-r, –recursive Read all files under each directory, recursively, following symbolic links only if they are on the command line. This is equivalent to the -d recurse option.
How long does it take to learn Linux?
Alongside the others recommendations, I’d suggest taking a look at The Linux Journey, and The Linux Command Line by William Shotts. Both of which are fantastic free resources on learning Linux. 
Generally, experience has shown that it usually takes some 18 months to become proficient in a new technology.