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this is a bash-only construct, not available in sh

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edited Jul 5, 2014 at 11:16

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UseChange #!/bin/sh to #!/bin/bash, and use double brackets instead:

if [[ $1 =~ $re ]]; then

This is the extended test command, as opposed to the (regular) test command. =~ can only be used with the [[ ... ]] version, and requires Bash 3.0 or later.

Use double brackets instead:

if [[ $1 =~ $re ]]; then

This is the extended test command, as opposed to the (regular) test command. =~ can only be used with the [[ ... ]] version, and requires Bash 3.0 or later.

Change #!/bin/sh to #!/bin/bash, and use double brackets instead:

if [[ $1 =~ $re ]]; then

This is the extended test command, as opposed to the (regular) test command. =~ can only be used with the [[ ... ]] version, and requires Bash 3.0 or later.

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answered Jul 4, 2014 at 8:30

Josh Jolly

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Use double brackets instead:

if [[ $1 =~ $re ]]; then

This is the extended test command, as opposed to the (regular) test command. =~ can only be used with the [[ ... ]] version, and requires Bash 3.0 or later.