Linux Commands I Use

Following are my git favourites:

Show a tree graph view won the terminal.

git log --graph --decorate

Git files that changed in a commit.

git show --stat --oneline <hash>

Show commit logs.

git log --oneline

Show difference between commits with changes.

git diff-tree -cc

Show git log with changes.

git log --cc

List of authors who committed to a repo

Usecase: Check the linux flavour

Command:

cat /proc/version

Also proc has a great set of other commands. Check what's available by doing

Usecase Zip the current directory and create the zip file in the parent folder

Command

zip -r ./../filename.zip .

Example

Following options show the process using port 80

netstat - Print network connections, routing tables, interface statistics, masquerade connections, and multicast memberships

sudo netstat -nlp | grep :80

lsof - list open files

Do the following in a command window to start the ssh agent service.

Usecase: Copy file from local computer to remote using SSH

Command:

Usecase: Update linux packages

Commands:

sudo apt-get update # Fetches the list of available updates

sudo apt-get upgrade # Strictly upgrades the current packages

Usecase: When I need to check memory on the machine

Command: egrep --color 'Mem|Cache|Swap' /proc/meminfo

or

free -m

Usecase: When you need to define access rights to files and folders for more than one user group.

Command: setfacl -m <rules> <files>

Usage: setfacl -m g:mygroup:rwx /var/somefolder

Usecase: Find the program using a given port

Command: netstat -tulpn | grep :<port>

Usage: netstat -tulpn | grep :80

Usecase: When I have multiple users and I want to switch from one to antoher:

Command: su <username>

Usecase: When you have a program running in the terminal and exits if you close the terminal.

Command: nohup

Usage: nohup ./someserverapp/bin/start.sh > /var/log/someserver-hohup.out&