linux

linux :
/etc/apt
df -h ==> check the mounted drives .

apt-cache search <search_term>   ==> search for apt packages .

apt-get build-dep <package_name> ==> install dependencies for a package .

sudo cat /etc/passwd

sudo cat /etc/shadow

sources.list.d when u add a source to apt u see it here

/etc/mongodb.conf where the mongod configuration file

adduser name
grep  node /etc/passwd
cut -f 1 -d ':'  /etc/passwd | grep  node



stat get file state