bash dictionary

1. Is there Dictionary in bash?
2. How do I declare a dictionary in bash?
3. What is dictionary in shell script?
4. What does =~ mean in bash?
5. What is bash party?
6. What is bash Linux?
7. Which bash version do I have?
8. How do I create a hash in bash?
9. Does bash have hash?
10. What is hash command in Linux?
11. How do I create a list in shell script?
12. How do I create an array in bash?

Is there Dictionary in bash?

Dictionary / associative arrays / hash map are very useful data structures and they can be created in bash. They work quite similar as in python (and other languages, of course with fewer features :)). We will go over a few examples. dictionaries were added in bash version 4.0 and above.

How do I declare a dictionary in bash?

Declare a Dictionary Variable in Bash

One of supported attributes is associative array. So when you want to use a dictionary in bash, use declare statement with -A option (meaning "associative array") to declare a dictionary variable. With this statement, test_var variable can only be used as a dictionary.

What is dictionary in shell script?

The indexed arrays are sometimes called lists and the associative arrays are sometimes called dictionaries or hash tables. The support for Bash Arrays simplifies heavily how you can write your shell scripts to support more complex logic or to safely preserve field separation.

What does =~ mean in bash?

Originally Posted by harry00514. Please let me understand the meaning of following line in unix bash scripting .is =~ means not equal to or equal to . if [[ $INFA_HOME =~ .*9.5.1.* ]]; then. That's the regular expression match operator.

What is bash party?

A bash is a party or celebration, especially a large one held by an official organization or attended by famous people. [informal] He threw one of the biggest showbiz bashes of the year as a 36th birthday party for Jerry Hall. Synonyms: party, do [informal], social, at-home More Synonyms of bash.

What is bash Linux?

Bash is a Unix shell and command language written by Brian Fox for the GNU Project as a free software replacement for the Bourne shell. First released in 1989, it has been used as the default login shell for most Linux distributions. ... Bash can also read and execute commands from a file, called a shell script.

Which bash version do I have?

To find my bash version, run any one of the following command: Get the version of bash I am running, type: echo "$BASH_VERSION" Check my bash version on Linux by running: bash --version. To display bash shell version press Ctrl + x Ctrl + v.

How do I create a hash in bash?

Use the following syntax:

1. VAR="some_value" echo -n 'Your-String-Here' | md5sum echo -n "$VAR" | md5sum echo -n 'some-value' | md5sum [options]
2. echo -n 'wpblog' | md5sum.
3. md5="set-string-here" hash="$(echo -n "$md5" | md5sum )" echo "$hash"
4. echo -n 'string-here' | openssl md5 echo -n "$VAR" | openssl md5.

Does bash have hash?

On UNIX-like operating systems, a hash is a built-in command of the bash shell, which is used to list a hash table of recently executed commands. It is used for views, resets, or manually changes within the bash path hash. It keeps the locations of recently executed programs and shows them whenever we want to see it.

What is hash command in Linux?

hash command in Linux system is the built-in command of bash which is used to maintain a hash table of recently executed programs. It remembers and shows the program locations. It will give the full pathname of each command name. ... -p: pathname use PATHNAME as the full pathname of NAME.

How do I create a list in shell script?

“create a list in shell script” Code Answer

1. #to create an array: $ declare -a my_array.
2. #set number of items with spaceBar seperation: $ my_array = (item1 item2)
3. #set specific index item: $ my_array[0] = item1.

How do I create an array in bash?

Create an array

1. Create indexed or associative arrays by using declare. We can explicitly create an array by using the declare command: $ declare -a my_array. ...
2. Create indexed arrays on the fly. ...
3. Print the values of an array. ...
4. Print the keys of an array. ...
5. Getting the size of an array. ...
6. Deleting an element from the array.