Master Essential Linux File Management Commands: mkdir, cp, rm, find and More

Directory Management Commands: mkdir, rmdir

The mkdir command creates new directories, while rmdir removes empty directories.

File Management Commands: cp, mv, rm

cp

copies files or directories, mv moves or renames them, and rm deletes files.

File Viewing Commands: cat, tac, head, tail, more, less

cat

concatenates and displays file contents; tac does the same in reverse order. head shows the beginning of a file, tail shows the end. more and less provide paginated viewing.

Command Execution Status

Bash stores the exit status of the last command in $?. Use echo $? to display it. A status of 0 means success; 1‑255 indicate various failures.

Advanced Directory Creation Examples

Create multiple directories with brace expansion:

(1) mkdir /tmp/{a,b}_{c,d}

(2) mkdir -P /tmp/mylinux/{bin,boot/grub,dev,etc/{rc.d/init.d,sysconfig/network-scripts},lib/modules,lib64,proc,sbin,sys,tmp,usr/local/{bin,sbin},var/{lock,log,run}}

File Metadata

Metadata includes permissions, owner/group, timestamps, size, and type.

Viewing Metadata with stat

Example:

# stat /etc/passwd

Defining Aliases

Use the alias command to create shortcuts for other commands.

Pattern Matching Examples

List directories matching complex patterns:

ls -d /var/l*[0-9][^0-9]

ls -d /etc/[0-9]*[^0-9]

ls -d /etc/[^[:alpha:]][[:alpha:]]*

mkdir /tmp/tfile-$(date +"%Y-%m-%d-%H-%M-%S")

cp -r /etc/p*[^0-9] /tmp/mytest1

cp -r /etc/*.d /tmp/mytest2

cp -r /etc/[lmn]*.conf /tmp/mytest3

Find Command Overview

The find command searches for files within a directory hierarchy.

How It Works

It traverses directories recursively, evaluating each file against specified criteria.

Advantages and Disadvantages

Advantages: precise searching and real‑time results. Disadvantages: can be resource‑intensive and slower on large file systems.

Typical Usage

Common patterns include locating files by name, type, size, or modification time.