linux
Where do you copy the environment files for the BASH shell from?
/etc/skel
How do you list the total number of inodes?
df -i
How many inodes are available?
df -i
How many inodes are being used?
df -i
Find the default shell of a user.
echo $SHELL
What are the 3 modes of the vi editor?
escape insert command
Why is the user unable to create more files?
there are no more inodes available on the system
less
less <filename> q-quit (view a file)
What is the command to make a directory structure?
mkdir -p
What is the command to view logs in real time?
real time logs view (tail -f)
Components of Linux.
shell and kernel
How do you find the kernel version?
uname -a
How do you check the system uptime and how many users are logged into the system?
uptime and who
tail
view lines at end (defaults at 10)
head
view lines from beginning (default at 10)
What environment files are needed for the BASH shell?
.bashrc and .bash_profile
How do you change the default shell?
/etc/passwd
What is the system error log file?
/var/log/messages
What is the security logs file?
/var/log/secure
/opt
Add-on application software packages.
/run
Contains dynamic, non-persistent application runtime data.
/srv
Data for services provided by this filesystem.
/dev
Device files.
/lib
Essential shared libraries and kernel modules.
/bin
Essential user command binaries.
/media
Mount Point for removable media.
/mnt
Mount Point for temporarily mounted file systems.
/usr/bin
Regular user commands and utilities are located here.
/boot
Static files of the boot loader.
/usr/sbin
System administration binaries, for root use, are here.
/sbin
System binaries.
/tmp
Temporary files are stored here.
/var
This directory contains dynamic configuration data, such as FTP and websites.
/proc
Virtual filesystem documenting kernel and process status as text files.
How do you check the distribution or version of the OS?
cat /etc/issue or cat /etc/RedHat-release
cat
concatenate
cp
copy
What is metadata?
data about data
How do you check how much space a filesystem is taking up?
du -h <file system>
/usr
Contains installed software programs and libraries.
/etc
This directory contains static, persistent system configuration data.
/
This is the system's root directory.
/home
User home directories are located under this directory.
mv
move
What is an inode?
place where metadata is stored
What is the dmidecode command?
prints hardware information