awk命令未在bash脚本中执行，但在命令行上工作正常

Question

I am new to bash scripting. I am trying to run the following script :

#! /bin/bash

#the following command runs fine within the bash script
awk>/home/Bash_Scripts/filename1 -F, '$3!="constant"{print}' /home/Bash_Scripts/logs.csv

# THE FOLLOWING COMMAND WORKS FINE FROM COMMAND LINE BUT NOT FROM WITHIN BASH SCRIPT

/usr/bin/awk -f /home/Bash_Scripts/process.awk /home/Bash_Scripts/filename1 

Can someone please explain why? Both are awk commands. One works only from commandline and not from within the bash script.

Thanks in advance.

Answer 1

Three points:

1. You are using /home/Bash_Scripts/filename1 as you output file in the script but as input file in the command line
2. /home/Bash_Scripts/logs.csv is your input file in the script.
3. You use /usr/bin/awk in the command line but just awk in the script. This is backwards to what is normally done as you know what PATH is set to in the command line but no idea in general for a script.