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- www.cyberciti.biz
  
  Linux / UNIX: Check If File Is Empty Or Not Using Shell Script
  
  Linux check if file empty or not - a sample shell command and script to check that file is empty or has data in it under bash / ksh / sh UNIX / Linux / OS X shell.
  
  2026-04-24
  
  瀏覽：683
- www.bashguru.com
  
  UNIX/Linux Bash Shell Scripting: Shell Script to Check Whether a String is Palindrome or not
  
  #!/bin/bash # SCRIPT: palindrome2.sh # USAGE: palindrome.sh or palindrome.sh STRING # PURPOSE: Script to test if a given string is a palindrome. # # In this script I uses the well known method, compare first character # with last character, up to middle o
  
  2026-04-17
  
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Other Comparison Operators

日期：2026-04-23

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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Linux Shell script to add a user with a password to the system - nixCraft

日期：2026-04-18

Could you kindly help me to integrate in this first script to add a user in /etc/shadow from a comma separeted file? I would like to export a list from a company application, create a .csv , and lunch it from a shell script or a php page in a website to i...

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UNIX and Linux Shell Script Test Command - IT For Everyone!

日期：2026-04-23

test returns true in the following cases: test s s is not a null string test -n string string is nonzero test sting1 = string2 the two strings are equal test sting1 != string2 the two strings are not equal test integer1 -eq integer2 the integers are equal...

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UNIX/Linux Bash Shell Scripting: Shell Script to Find Prime Number

日期：2026-04-20

#!/bin/bash # SCRIPT: prime2a.sh # USAGE : ./prime2a.sh # PURPOSE: Finds whether given number is prime or not echo -n "Enter a number: "read num # Integer Validation #...

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linux - Why doesn't "cd" work in a bash shell script? - Stack Overflow

日期：2026-04-18

Is it worth noting that on MS-DOS, the behaviour of scripts was that a called script could change the directory (and even drive) of the calling command shell? And that Unix does not have this defect? – Jonathan Leffler Nov 4 '08 at 23:08...

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