Daily Unix Commands

If you are a dev or a sys admin  you must rely on unix command to get things done.

These are my daily unix tools list,I am putting these together for myself as a future reference,if it helps anyone else I will be happy 🙂


I use ‘screen’  for keeping myself alive in my remote cloud machines. If you are new to screen,please check this docs.

Checking list of screen in current machine 'screen -ls'
Resuming 'screen -r screen_name' or 'screen -r pid'
Create new screen 'screen -S screen_name'
Detach from screen using 'ctrl+a+d'
Copy mode start 'ctrl+a+{'
Kill the current window 'ctrl+k'

Screen cheatscheet1 screen cheat sheet2

File Compression

Using zip and unzip

Zip command example is like below:

zip backup.zip filename1 filename2
zip -r backup.zip dir_name

Unzip command example is like below:

unzip backup.zip

tar,gzip and bzip2

tar cfv backup.tar filename1 filename2
tar xvf backup.tar

for specific directory

tar xvf backup.tar -C /dir_name/

to use gzip compression use -z  and for bzip2 compressing use -j like this

for compression:

tar -zcfv backup.tar.gzip filename1
tar -jcfv backup.tbz2 filename

for uncompression

tar -zxvf backup.ta
tar -jxvf  backup.tbz2

Unix file compression cheat sheet

And if you want to learn details about this compression techniques please check this

Vim basics

I use vim for editing files in unix system(specially in remote machines).These are list of commands I use:

Basic Navigation:

H->first line of the file
G->last line of the file
$->end of the line

Changing Line:

yy->copy the current line
p->paste the copied line

check Vim Cheat sheet .

I rarely use ‘sed’ command,and I only used it for easy find replace of strings(its really handy when you have to work on multiple files for same find replace ).The syntax is like below:

sed s/search_string/replace+string old_file.txt > new_file.txt

check sed refernce


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