I solved this just cleaning/declaring the statusCheck associative array … Example. Bash, however, includes the ability to create associative arrays, and it treats these arrays the same as any other array. 1. Share on Mastodon Quick reference of things I discovered about how to use associative arrays in bash. The syntax is not the same on bash and ksh. I will mention the shell used before each example. Note: bash version 4 only. One of these commands will set replication servers. Following is an example Bash Script in which we shall create an array names, initialize it, access elements of it and display all the elements of it. In some programming languages, arrays has to be declared, so that memory will be allocated for the arrays. Update: see also Bash Arrays. Examples. There are at least 2 ways to get the keys from an associative array of Bash. However, I find that things like: Bash, however, includes the ability to create associative arrays, and it treats these arrays the same as any other array. Let’s start with an example associative array: $ declare -A aa $ aa["foo"]=bar $ aa["a b"]=c. According to project, number of servers can be different. Enough with the syntax and details, let’s see bash arrays in action with the help of these example scripts. Declare an associative array Empty array. Example 1: Bash Array. Let’s create an array that contains name of the popular Linux distributions: distros=( Awk supports only associative array. List Assignment. Bash: declare -A MYARRAY Ksh: typeset -A MYARRAY Array with values. You can assign values to arbitrary keys: $ Declaring an Array and Assigning values. Bash associative array examples. Bash Shell Script An associative array lets you create lists of key and value pairs, instead of just numbered values. If you are familiar with Perl, C, or Java, you might think that Bash would use commas to separate array elements, however this is not the case; instead, Bash uses spaces: I have this associative array that is the hostname an IPs of servers (I used an associative array because other parts of code needed it). name is any name for an array; index could be any number or expression that must evaluate to a number greater than or equal to zero.You can declare an explicit array using declare -a arrayname. Bash supports both regular arrays that use integers as the array index, and associative arrays, which use a string as the array index. Associative arrays are like traditional arrays except they uses strings as their indexes rather than numbers. So for example after some repetion the content of the value was "checkKOcheckKOallCheckOK" and this was not good. I am writing a bash script on CentOS 7.5 that will execute some MongoDB commands. Play my Android game Rabbit Escape! 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