Add jq, curl and bash nodes.

20220130131134-bash.org

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+:PROPERTIES:
+:ID:       72eb2d10-5b92-4fb7-9e4e-1398bd933335
+:mtime:    20220130133646
+:ctime:    20220130131134
+:END:
+#+title: bash
+
+* Installation
+#+BEGIN_SRC shell
+apt-get install bash
+#+END_SRC
+
+* Tips
+** Initialiser une variable non intialisée ou null
+#+BEGIN_SRC shell :output dispay
+a=
+c='AAA'
+${a:='coucou'}
+${b:=123}
+${c:='coucou'}
+echo "a=${a}"
+echo "b=${b}"
+echo "c=${c}"
+#+END_SRC
+
+#+RESULTS:
+| a=coucou |
+| b=123    |
+| c=AAA    |
+** Initialiser une variable non initialisée
+#+BEGIN_SRC shell :output dispay
+a=
+c='AAA'
+${a='coucou'}
+${b=123}
+${c='coucou'}
+echo "a=${a}"
+echo "b=${b}"
+echo "c=${c}"
+#+END_SRC
+
+#+RESULTS:
+| a=    |
+| b=123 |
+| c=AAA |