ls

列出指定目錄下的檔案

cd

切換目錄

cp

複製檔案

chmod

變更檔案之權限

chown
chgrp

變更檔案之擁有者/群組

find

找出檔案樹中所有符合條件的檔案

head
tail

印出一個檔案的前/後 n行

rm
rmdir

刪除檔案或目錄

mkdir

新增目錄

pwd

印出當前工作目錄

cksum

用來計算檔案之 checksum

diff

比較兩個檔案，找出相異之處

comm

比較兩個排序過的檔案，找出相同及相異之處

file

用來檢查檔案類型的指令。 它可以告訴你檔案是文本文件、二進制文件、壓縮文件還是其他類型的文件。

du

計算檔案或目錄的 block 佔用量

df

顯示磁碟剩餘空間

touch

更新檔案的變動或讀取時間

od

將檔案內容用八進位或十六進位印出來

umask

設定檔案創建時的預設權限

tar

打包一批檔案，原係設計給磁帶機使用，現在都當作一般打包軟體使用

zip
unzip

打包檔案軟體

gzip
gunzip

打包檔案軟體

bzip2
bunzip2

打包檔案軟體

ls

List files. Options control the information shown.

cd

Change working directory.

cp

Copy files and directories.

chmod

Change the permissions (mode) of files and directories.

chown
chgrp

Change the owner/group of files and directories.

find

Descend one or more directory hierarchies finding filesystem objects (files, directories, special files) that match specified criteria.

head
tail

Print the first/last n lines of one or more files.

rm
rmdir

Remove files and directories.

mkdir

Make directories.

pwd

Print the current working directory.

cksum

Print a file checksum, POSIX standard algorithm.

diff

Compare two files, showing differences.

comm

Print or omit lines that are unique or common between two sorted files.

file

Guess the type of data in a file by examining the first part of it.

du

Show disk block usage of files and directories.

df

Show free disk space.

touch

Update the modification or access time of a file.

od

Octal dump; print file contents in octal, hexadecimal, or as character data.

umask

Set the default file-creation permissions mask.

tar

Tape archiver. Now used mostly as a software distribution format.

zip
unzip

File archiver and compressor/decompressor.

gzip
gunzip

High-quality file compression and decompression.

bzip2
bunzip2

Very high quality file compression and decompression.