Unix Tutorial Practice

Recap: Unix Commands

Navigating Files and Directories

Command	Description
echo $HOME
ls	list files and directories
ls -a	list all files and directories
mkdir	make a directory
cd	change to named directory
cd	change to home-directory
cd ~	change to home-directory
cd ..	change to parent directory
pwd	display the path of the current directory

Working With Files and Directories

Command	Description
cp file1 file2	copy file1 and call it file2
mv file1 file2	move or rename file1 to file2
rm file	remove a file
rmdir <directory>	remove a directory

Closer Look into Files

Command	Description
cat file	display a file
less file	display a file a page at a time
head file	display the first few lines of a file
tail file	display the last few lines of a file
grep _'keyword'_ file	search a file for keywords
wc <file>	count number of lines/words/characters in file

Redirection and Piping

Command	Description
command > file	redirect standard output to a file
command >> file	append standard output to a file
command < file	redirect standard input from a file
`command1	command2`
cat file1 file2 > file0	concatenate file1 and file2 to file0
sort	sort data
who	list users currently logged in