Linux lsattr command

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The Linux lsattr command is used to display file attributes.

Use chattr to change the attributes of files or directories, and use lsattr to query their attributes.

Syntax

lsattr [-adlRvV][file or directory...]

Parameters:

• -a Display all files and directories, including the built-in ones with names starting with ".", the current directory "." and the parent directory "..".
• -d Display directory name, not its content.
• -l This parameter currently has no effect.
• -R Recursive processing, process all files and subdirectories under the specified directory at the same time.
• -v Display file or directory version.
• -V Display version information.

Online Examples

1Use chattr command to prevent a key file in the system from being modified:

# chattr +i /etc/resolv.conf

Then use mv /etc/Operations such as resolv.conf on this file result in Operation not permitted.

When editing the file with vim, it will prompt W10: Warning: Changing a readonly file error. To modify this file, you need to remove the i attribute:

chattr -i /etc/resolv.conf

Use the lsattr command to display file attributes:

# lsattr /etc/resolv.conf

Output result is:

----i-------- /etc/resolv.conf

2Set a file to only append data and not delete, suitable for various log files:

# chattr +a /var/log/messages

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