How to ignore case sensitive in ls
The ls command is one of the most frequently used commands in Linux. It is used to list the contents of a directory. However, by default, the ls command is case-sensitive, which means it differentiates between uppercase and lowercase characters. This can be a problem when you want to search for a file or directory that has a mixed case name. In this blog post, we will discuss how to let ls command ignore case sensitive characters.
ls Command
If you want to ignore case sensitive characters with the ls command, you can use the -i option. This option tells the ls command to ignore the case of the characters in the file names. To use this option, simply type ls -i in the terminal.
ls -i
This will list all the files and directories in the current directory, ignoring the case of the characters in their names.
ls Command with grep
You can also use the ls command with grep to ignore case sensitive characters. The grep command is used to search for a specific pattern in a file. By default, the grep command is case-sensitive, but you can use the -i option to ignore case sensitive characters.
To use the ls command with grep, you need to pipe the output of ls to grep. Here is an example:
ls | grep -i "filename"
This command will list all the files and directories in the current directory that contain the pattern “filename”, ignoring the case of the characters in their names.
shopt
### switch off case sensitive mode
shopt -s nocaseglob
### switch on case sensitive mode (default)
shopt -u nocaseglob
### help shopt
help shopt
zsh unsetopt
### switch on case sensitive mode
unsetopt CASE_GLOB
### switch off case sensitive mode (default)
setopt CASE_GLOB