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Introduction to if

日期：2025-06-12

The TEST-COMMAND list is executed, and if its return status is zero, the ... More information about this subject can be found in the Bash documentation. ... valid UNIX command, any executable program, any executable shell script or any shell ......

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Bourne/bash shell scripts: string comparison | a Tech-Recipes Tutorial

日期：2025-06-12

Brief tutorial describing how to do string comparisons. Recently updated thanks to comments from our users. Our original tutorial needed correcting for the case if ......

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Other Comparison Operators

日期：2025-06-10

Note that integer and string comparison use a different set of operators. ... String=' ' # Zero-length ("null") string variable. if [ -z "$String" ] then echo "\$String is null. ... bin/bash # str-test.sh: Testing null strings and unquoted strings, #...

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Unix/Linux shell script reference page | alvinalexander.com

日期：2025-06-11

Linux shell script math/number equality tests Here's how you perform math/number/arithmetic tests using the Bourne and Bash shells: n1 -eq n2 Test if n1 equals n2 n1 -ne n2 Test if n1 is not equal to n2 n1 -lt n2 Test if n1 is less than n2 n1 -le n2 Test ...

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Change directory in a shell script | Unix Linux Forums | Linux

日期：2025-06-15

How do u change ur directory using a shell script?? ... When you run the script in this manner, all the changes you make to env variables will remain after your exit the script....

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