Day'06 -linux Command Part-02

rmdir(remove directory)- It removes the directory

rmdir <file/directory name>

rm(remove)- It removes both empty and non-empty files/directory

rm <file/directory name>

rm -r : recurcively deletes all the content and sub folders/ files

rm -r <file/directory name>

rm -rf : forcefully deletes the files/directory

rm -rf <file/directory name>

tree - To view the directories and its sub directories/ files in an hierarchy manner

Before executing the tree command, we need to install the tree by using yum

yum install tree (in admin access by using ‘sudo’)

cat * - To view all the content of all the files in root directory

cat > file.txt - To create a file, without opening the file screen, can enter and can edit the file in gitblash screen only.

press ctrl d to exit from it.

cat » file.txt - To update the file file.txt

tac file.txt - To display the file content in reverse order

cp - To copy the file/directory from one directory to another.

synx: cp source destination

sweety.txt file is copied to linux directory

cp * - To copy ‘n’ files

cp . - Every file/directory will be copied

cp -r . /tmp ( The files & directories from present working directory will be copied to tmp directory)

mv - To move the content from one file/directory to another

For renaming also ‘mv’ is used

tile - To display the last few lines of content of file, default it selects 10 lines

• head - To display the first few lines of content of file, default it selects 10 lines

head -n 3 file.txt - To display first 3 lines of file content

tail -n 3 file.txt - To display last 3 lines of file content

sort - To view the file content in sorting format

sort file.txt (ascending order)

sort -r file.txt (descending order)

sort -u file.txt (To remove duplicate)

sort -ur file.txt (To remove duplicate and view in reverse order)