Bash
Digital Ocean has a great writeup to get you started
Shell
Here is an illustrative example. We want to change a folder’s permissions, but the path name is surrounded in quotation marks and needs to be extracted from the output of another command (docker ps).
Our desired path is the second string in the output of grep, so we pass it to awk before sed:
sudo chmod 777 $(docker inspect shared-shared | grep "Mountpoint" | awk '{print $2}' | sed 's/"//g' | sed 's/,//g')
ssh-agent: logging in remotely
ssh-copy-id name-of-remote-server
SSH Keys with Multiple GitHub Accounts
Using multiple keys on the same computer
Summary: set urls like this, where the url refers to the Host in file ~/.ssh/config (shown below):
git remote set-url origin ssh://git@github.com/mathematicalmichael/repo.git
Host github.com
Hostname github.com
User git
AddKeysToAgent yes
UseKeychain yes
IdentityFile ~/.ssh/id_rsa
You need to add the key to your agent.
eval "$(ssh-agent -s)"
ssh-add ~/.ssh/id_rsa_personal
make (GNUMake)
Autocomplete make targets
complete -W "\`grep -oE '^[a-zA-Z0-9_.-]+:([^=]|$)' ?akefile | sed 's/[^a-zA-Z0-9_.-]*$//'\`" make
pgp / gnupg
To enter password via command-line, select pinetry-tty after running the following:
sudo apt install pinentry-tty
sudo update-alternatives --config pinentry
export GPG_TTY=$(tty)
To restart, echo RELOADAGENT | gpg-connect-agent
or gpg-connect-agent reloadagent /bye
Linux (Ubuntu), General
Mark packages to avoid upgrade
Setting Up A Secure Ubuntu Server in the Cloud
pass - the standard UNIX password manager
