shell scripting parameter ${1, ,}_name

Question

I came across shell scripting already present.Trying to undertand what ${1,,} means here :

if [[ ${2} -eq 0 ]]; then
delNam${1,,}_delete_$date

new to shell scripting.

it is down vote favorite I came across shell scripting already present.Trying to undertand what ${1,,} means here : if [[ ${2} -eq 0 ]]; then delNam=${1,,}delete$date — genifer, Mar 23 '16 at 07:28

score 1 · Accepted Answer · answered Mar 23 '16 at 07:54

1

${1,,} will convert the first positional parameter to lowercase. In other words, if the script was run like ./script.sh FooBar 0 and $date is 2016, the second line will expand to delNamfoobar_delete_2016, which will then be run as a command.

answered Mar 23 '16 at 07:54

l0b0

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score 0 · Answer 2 · answered Jun 10 '16 at 13:54

0

${2} is for input for second parameter & delNam${1,,}delete$date for input of 1st parameter with current date.

answered Jun 10 '16 at 13:54

sudhir kumar mishra

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shell scripting parameter ${1, ,}_name

2 Answers2