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Basic Definitions Application Script Process Daemon Thread Job Monitoring and Management command ...

useradd username create a user groupadd groupname create a group userdel username delete user gro...

File Permissions Files that are not scripts do not have x Directories have x because users can cd...

Scheduled Tasks crontab -e scheduled jobs -e edit at. scheduled one-off jobs * * * * * minute  (0...

Basic Commands echo $0 display current shell cat /etc/shells display available shells cat /etc/pa...

Text Editors ed (1969) original, line oriented standard for  Unix ex (1976) extended, more powerf...

Linux Filesystems: ext3 ext4 xfs Windows Filesystems: NTFS FAT Basic Commands pwd print working d...