Ch.4.2 Understanding Hardware Flashcards
uname
Check operating system name
uname -r
Check kernal release version
free -m
Obtains memory info with megabyte units
lscpu
Ouputs cpu more friendy display of cpu information
lsblk
Lists block devices on system
What is the max amount of memory an app can use on a 32 bit system ?
4gb
How many bits must a system have if it runs appss that need more than 4gb of memory ?
64bit
Software that combines additional disks and partitions into one device ?
Logical Volume Manager (LVM)
What does a device driver do ?
Accepts standard sets of requests then translates them into device appropriate control activites
What is found in the “/dev” dir ?
Files to identify physical devices, device access, and supported drivers
What are devices file name prefixed with ?
“sd”
What are device files for SD cards prefixed with ?
“mmcblk”
How are devives and partitions named using the “/dev/sda” convention ?
- all start with “sd”
- next letter maps to entire device in descending order
- a number is appended at the end to represent the partition
What is located in dir “proc/cpuinfo” ?
detailed information about a system’s processor
What does the command “lscpu” display ?
The same info that “proc/cpuinfo” displays but in a more friendly format
