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add details on bash/dash, refer to bash directly

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t=lkj
echo ${t:0:${#t}-1}

You get a substring from 0 to the string length -1. Note however that this substraction is a bashishm bash specific, and won't work on other shells.

For instance, dashdash isn't able to parse even

echo ${t:0:$(expr ${#t} - 1)}

For example, on Ubuntu, /bin/sh is dash

t=lkj
echo ${t:0:${#t}-1}

You get a substring from 0 to the string length -1. Note however that this substraction is a bashishm, and won't work on other shells.

For instance, dash isn't able to parse even

echo ${t:0:$(expr ${#t} - 1)}

t=lkj
echo ${t:0:${#t}-1}

You get a substring from 0 to the string length -1. Note however that this substraction is bash specific, and won't work on other shells.

For instance, dash isn't able to parse even

echo ${t:0:$(expr ${#t} - 1)}

For example, on Ubuntu, /bin/sh is dash

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answered Jul 13, 2014 at 18:22

t=lkj
echo ${t:0:${#t}-1}

You get a substring from 0 to the string length -1. Note however that this substraction is a bashishm, and won't work on other shells.

For instance, dash isn't able to parse even

echo ${t:0:$(expr ${#t} - 1)}