文件路径匹配问题：如何筛选以myfile_开头的CSV文件？

Hey there! Let's troubleshoot why your current pattern isn't returning those CSV files and get you the right matching syntax for different scenarios.

1. Matching Files in the Current Directory (Shell Glob) #

If you're looking for files directly in your working directory, the simplest and correct pattern is:

myfile_*.csv

• The * wildcard matches any sequence of characters (including none) between myfile_ and .csv. This will catch files like myfile_sales.csv, myfile_2024.csv, even myfile_.csv if it exists.

Common Pitfall: Case Sensitivity #

If your system is case-sensitive (most Linux setups) and some files end with .CSV (uppercase), use a case-insensitive glob pattern:

myfile_*.[cC][sS][vV]

Or, if you're using Bash, temporarily enable case-insensitive globbing:

shopt -s nocaseglob
myfile_*.csv

Don't forget to disable it later if needed with shopt -u nocaseglob.

2. Recursively Matching Files in Subdirectories #

If you need to search through all subdirectories too:

Bash 4+ (with globstar) #

First enable the globstar option (lets ** match all subdirectories):

shopt -s globstar

Then use this pattern:

**/myfile_*.csv

Using find Command (Works Across All Shells) #

The find command is more reliable for recursive searches, especially if you don't want to mess with shell options. Use this:

find . -type f -name "myfile_*.csv"

• . means start searching from the current directory
• -type f ensures we only match files (not directories)
• -name "myfile_*.csv" uses the same glob pattern, wrapped in quotes to prevent the shell from expanding it early.

For case-insensitive recursive search, swap -name with -iname:

find . -type f -iname "myfile_*.csv"

Why Your Previous Command Might Have Returned Empty #

Double-check these common issues:

• Did you forget the .csv suffix? For example, using myfile_* would match all files starting with myfile_, but if you only want CSVs, the suffix is mandatory.
• Were you in the wrong directory? Run pwd to confirm your current working directory, or specify the full path (e.g., /home/your/data/myfile_*.csv or find /home/your/data -type f -name "myfile_*.csv").
• Did you use the wrong wildcard? ? only matches a single character, so myfile_?.csv would only match files like myfile_a.csv, not longer names.

内容的提问来源于stack exchange，提问作者Pozmanski