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Shell/Bash 2022-03-22 03:20:11
${a,}: bad substitution
var=hello #For Bash Version higher than 4.3.33 try these echo ${var''} #Uppercase whole string HELLO echo ${var'} #Uppercase only first char of string Hello var2=BYE echo ${var2,} #Lowercase whole string bye echo ${var2,,} #Lowercase only first char of st... Add solution