Working with directory and files

mkdir dir

create single directory dir

mkdir dir1 dir2

create multiple directories dir1 dir2

mkdir -p dir/a/b/c

create nested directory dir/a/b/c

mkdir dir{1..10}

created 10 numbered directories from dir1 to dir10

rm -r dir

remove dir recursively

touch file

create empty file file

touch file1 file2

create multiple files file1 file2

touch file{1..10}

create 10 numbered files from file1 to file10

cp -rf /dir/file1 /dir2

copy file file1 to dir2 directory recursively and forcefully

mv /dir/file1 /dir2

move file file1 to dir2 directory

rm file1

remove file file1

show files - both regular & hidden files and their permissions

cat file1

display contents of file1

find /dir1 -name file1

find file1 under /dir1 directory

find /dir1 -perm 664

find all files/directories with read, write permission to owner and group, read permission for others in directory dir1

find /dir1 -empty -exec rm -r {}**

find and remove all empty files/directories from /dir1

wc -l file1

count the number of lines in file1

wc -w file1

count the number of words in "file1*

head file1

display top 10 lines of file1

head -n 20 file1

display top 20 lines of file1

tail file1

display last 10 lines of file1

tail -n 20 file1

display last 20 lines of file1