WebFeb 21, 2024 · The syntax is as follows: $ {var:=value} var = $ {USER:=value} The assignment (:=) operator is used to assign a value to the variable if it doesn’t already have one. Try the following examples: echo "$USER" Sample outputs: vivek Now, assign a value foo to the $USER variable if doesn’t already have one: echo $ {USER:=foo} … WebMar 21, 2013 · 16 On Centos my script work fine. But on Debian Squeeze when I run script, I got: cpfailover.sh: 30: Bad substitution Line of script say: SCRIPT_PATH="$ {BASH_SOURCE [0]}"; I have seen in many examples, even here, that is a correct line no. where is the problem. bash variables Share Improve this question Follow edited Mar 21, …
sudo with dash gives bad substitution - Ask Ubuntu
Webthe following command works in dash but fails in bash with "Bad file descriptor". $ dash -c 'out=$ (echo "to fd3" >&3; echo "to stdout") 3>&1; echo "out: $out"' to fd3 out: to stdout $ bash -c 'out=$ (echo "to fd3" >&3; echo "to stdout") 3>&1; echo "out: $out"' bash: 3: Bad file descriptor out: to stdout WebJul 27, 2011 · It does not work with dash. On Debian, the default sh is dash. When dash encounters $ {file//IMG/myVacation}, it fails with Bad substitution error because this syntax does not conform to POSIX. – Susam Pal Sep 22, 2024 at 9:38 @SusamPal Ah, yes, I was aware BASH has many features that are not POSIX compliant. (It says as much in the … easton ghost catchers mitt
Bash Bad Substitution Syntax Error: Simple and Quick Fixes - CODEFA…
WebMar 9, 2024 · To change the shell used and solve the bad substitution error, we must first change the first line of code to #!/bin/bash. So, the code is no longer executed with dash … WebSep 12, 2015 · EDIT: And to convince you that the sh/dash/bash is not your root problem here, once you've check your commands run OK when typed in the same shell session … WebOther solutions mix regex syntaxes. To use perl/PCRE patterns for both search and replace, and process only matching files, this works quite well:. grep -rlIZPi 'match1' xargs -0r perl -pi -e 's/match2/replace/gi;' match1 and match2 are usually identical but match2 can contain more advanced features that are only relevant to the substitution, e.g. capturing groups. easton ghost glove 12.5