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Scripts: Unix :: String processing :: Library Article #1

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Basic String Operations
By: Erobo Team Member

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Learn Basic string operations in Unix such as concatenation and substrings.

Unix Strings:

Bourne Shell
we can use translate "tr" to change characters within a variable. Example:

 Code Snippet 1

#!/bin/sh
# Change character i for u
myexample="fill"
echo $myexample | tr 'i' 'u'



Use "sed" to eliminate trailing space and tabs in a string:

 Code Snippet 2

#!/bin/sh
myexample2="this is    another example on strings."
cat $myexample2 |\
sed 's/[    ][ ]*//g' |\ 
sed 's/[.]/ period /g' 


In the last example we take the string, eliminate spaces and tabs, and replace the period (.) for the actual word "period".


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