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How to ignore case sensitive characters in ls command

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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.

Using ‘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
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