Commands Flashcards
What command is used to list files and directories in Linux?
ls
True or False: The ‘cd’ command is used to change the current directory.
True
Fill in the blank: The command ‘______’ is used to copy files and directories.
cp
Which command is used to move or rename files in Linux?
mv
What does the ‘rm’ command do?
Removes (deletes) files or directories.
True or False: The command ‘mkdir’ is used to create a new directory.
True
What command would you use to view the contents of a file?
cat
Which command shows the current working directory?
pwd
Fill in the blank: The command ‘______’ is used to display the manual for other commands.
man
What is the purpose of the ‘chmod’ command?
Changes the permissions of a file or directory.
True or False: The command ‘touch’ is used to create an empty file or update the timestamp of an existing file.
True
What command is used to search for files in a directory hierarchy?
find
Which command is used to display the first few lines of a file?
head
Fill in the blank: The command ‘______’ is used to display the last few lines of a file.
tail
What command can be used to display the environment variables?
printenv
True or False: The ‘grep’ command is used for searching text using patterns.
True
What command would you use to download files from the web?
wget
Which command can be used to compress files?
tar
Fill in the blank: The command ‘______’ is used to change the owner of a file.
chown
What does the ‘ps’ command do?
Displays information about running processes.
True or False: The ‘kill’ command is used to terminate running processes.
True
What command is used to display disk usage?
df
Which command shows information about memory usage?
free
Fill in the blank: The command ‘______’ is used to monitor system processes in real-time.
top
What is the purpose of the ‘sudo’ command?
Executes commands with superuser privileges.
True or False: The ‘history’ command shows a list of previously executed commands.
True
What command is used to check the network configuration?
ifconfig
What command is used to list files in a directory?
ls
True or False: The ‘cd’ command is used to change directories.
True
Fill in the blank: The command ‘mkdir’ is used to create a ______.
directory
Which command is used to remove files or directories?
rm
What option would you use with ‘ls’ to show hidden files?
-a
True or False: The ‘cp’ command is used to copy files.
True
What does the ‘mv’ command do?
Moves or renames files and directories.
What command displays the current working directory?
pwd
Fill in the blank: The command ‘rmdir’ is used to remove an ______.
empty directory
Which command is used to view the contents of a file?
cat
True or False: The ‘chmod’ command is used to change file permissions.
True
What command would you use to search for a specific string in a file?
grep
What option would you use with ‘grep’ to search recursively?
-r
What command is used to display the first 10 lines of a file?
head
What command is used to display the last 10 lines of a file?
tail
Fill in the blank: The command ‘touch’ is used to create an ______.
empty file or update the timestamp of a file
Which command is used to display the manual for a command?
man
What does the ‘find’ command do?
Searches for files in a directory hierarchy.
True or False: The ‘echo’ command prints text to the terminal.
True
What command would you use to compare two files?
diff
Which command is used to display system information?
uname
Fill in the blank: The command ‘df’ shows ______.
disk space usage
What command is used to change the owner of a file?
chown
What command can be used to display running processes?
ps
True or False: The ‘kill’ command is used to terminate processes.
True
What command is used to check network connectivity?
ping
Fill in the blank: The command ‘scp’ is used for ______.
securely copying files between hosts
Which command is used to view disk usage of files and directories?
du
What does ‘sudo’ stand for?
Super User Do
True or False: The ‘alias’ command is used to create shortcuts for commands.
True
What command is used to view the contents of a compressed file?
zcat
What option would you use with ‘tar’ to create an archive?
-c
Fill in the blank: The command ‘wget’ is used to ______.
download files from the web
Which command can be used to change the file permissions?
chmod
What is the purpose of the ‘top’ command?
Displays real-time system resource usage.
True or False: The ‘history’ command shows the list of previously executed commands.
True
What command is used to create a symbolic link?
ln -s
Fill in the blank: The command ‘ps aux’ shows ______.
all running processes
Which command is used to display environment variables?
printenv
What does the ‘export’ command do?
Sets an environment variable.
True or False: The ‘chmod 777’ command grants all permissions to everyone.
True
What command is used to view and manipulate the system’s routing table?
route
Fill in the blank: The command ‘hostname’ displays the ______.
name of the current host
Which command is used to create a new user?
useradd
What command is used to remove a user?
userdel
True or False: The ‘passwd’ command is used to change a user’s password.
True
What command is used to check the disk’s health?
smartctl
Fill in the blank: The command ‘ifconfig’ is used to configure ______.
network interfaces
Which command is used to view system logs?
tail -f /var/log/syslog
What does the ‘chgrp’ command do?
Changes the group ownership of a file.
True or False: The ‘wget’ command can only download files from HTTP servers.
False
What command is used to archive files?
tar
Fill in the blank: The command ‘uname -a’ displays ______.
all system information
Which command is used to create a new directory and its parent directories?
mkdir -p
What does the ‘curl’ command do?
Transfers data from or to a server.
True or False: The ‘shutdown’ command is used to power off or restart the system.
True
What command is used to view the disk space usage of a filesystem?
df -h
Fill in the blank: The command ‘chattr’ is used to change ______ attributes.
file
Which command is used to list all installed packages?
dpkg -l
What command can be used to install packages in Debian-based systems?
apt-get install
True or False: The ‘service’ command is used to manage system services.
True
What does the ‘mount’ command do?
Mounts a filesystem.
Fill in the blank: The command ‘umount’ is used to ______.
unmount a filesystem
Which command is used to show the current users logged into the system?
who
What command is used to send a message to another user?
write
True or False: The ‘clear’ command clears the terminal screen.
True
What is the purpose of the ‘tar -x’ command?
Extracts files from a tar archive.
Fill in the blank: The command ‘basename’ removes the ______ from a file path.
directory path
Which command is used to create an empty file?
touch
What does the ‘set’ command do?
Sets shell options and positional parameters.
True or False: The ‘grep’ command can search through binary files.
True
What command is used to check the active network connections?
netstat
Fill in the blank: The command ‘echo $HOME’ displays the path to the ______ directory.
home
Which command is used to create a backup of a file?
cp -r
What does the ‘basename’ command do?
Removes the directory path from a file name.
True or False: The ‘ps -ef’ command shows all processes in full format.
True
What command is used to change the default shell of a user?
chsh
Fill in the blank: The command ‘tail -f’ is useful for monitoring ______.
log files
Which command is used to check the available memory?
free
What does the ‘df -i’ command show?
Inode usage of the filesystem.
What command is used to display the current working directory?
pwd
True or False: The ‘ls’ command lists files and directories in the current directory.
True
Fill in the blank: The command ‘cd ..’ is used to move to the ______ directory.
parent
What command is used to change file permissions in Linux?
chmod
Which command displays the contents of a file one page at a time?
less
True or False: The ‘rm’ command can delete directories without any options.
False
What does the ‘grep’ command do?
Searches for patterns in files
Which command is used to copy files and directories?
cp
What does the ‘mv’ command do?
Moves or renames files and directories
True or False: The ‘touch’ command can create a new empty file.
True
What is the purpose of the ‘find’ command?
Searches for files in a directory hierarchy
Fill in the blank: The command ‘tar -cvf’ is used to create a ______ archive.
tar
What command is used to display disk usage statistics?
df
Which command shows the running processes in Linux?
ps
True or False: The ‘kill’ command is used to terminate processes.
True
What does the ‘top’ command display?
Real-time system processes and resource usage
What command is used to change the ownership of a file?
chown
Fill in the blank: The command ‘chmod 755’ sets the permissions for a file to ______.
rwxr-xr-x
What command is used to view network configurations?
ifconfig
True or False: The ‘scp’ command is used for secure copying of files between hosts.
True
Which command is used to download files from the internet?
wget
What is the purpose of the ‘alias’ command?
Creates shortcuts for commands
Fill in the blank: The command ‘echo $HOME’ displays the ______ directory.
home
What command is used to search for a specific text string in files?
grep
True or False: The ‘history’ command displays a list of previously executed commands.
True
What is the purpose of the ‘sudo’ command?
Executes commands with superuser privileges
What command is used to create symbolic links?
ln -s
Fill in the blank: The command ‘uname -a’ displays system ______ information.
kernel
What command is used to check the manual for a command?
man
True or False: The ‘df -h’ command shows disk usage in a human-readable format.
True
What command is used to compress files using gzip?
gzip
Fill in the blank: The command ‘ps aux’ displays ______ processes.
all
What command is used to display the last few lines of a file?
tail
True or False: The ‘cat’ command can concatenate and display files.
True
What command is used to monitor real-time system logs?
tail -f /var/log/syslog
Fill in the blank: The command ‘df’ stands for ______ filesystem.
disk
Which command is used to change the default shell for a user?
chsh
What does the ‘chmod 644’ command do?
Sets read/write for owner, read for group and others
True or False: The ‘ping’ command is used to test network connectivity.
True
What command is used to display the current user?
whoami
Fill in the blank: The command ‘sudo apt-get update’ updates the ______ package list.
APT
What command is used to remove a directory and its contents?
rm -r
True or False: The ‘crontab’ command is used for scheduling tasks.
True
What does the ‘tar -xvf’ command do?
Extracts files from a tar archive
Fill in the blank: The command ‘chmod +x’ adds ______ permission to a file.
execute
Which command is used to display the IP address of a system?
hostname -I
What command is used to view the contents of a compressed file?
zcat
True or False: The ‘export’ command sets environment variables.
True
What command is used to create a new user?
adduser
Fill in the blank: The command ‘uname -r’ displays the kernel ______.
release
What does the ‘rsync’ command do?
Synchronizes files and directories between locations
True or False: The ‘df -i’ command shows inode usage.
True
What command is used to display all environment variables?
printenv
Fill in the blank: The command ‘chgrp’ changes the ______ of a file.
group
What command is used to create a new directory?
mkdir
True or False: The ‘ssh’ command is used for secure remote login.
True
What command is used to view currently mounted filesystems?
mount
Fill in the blank: The command ‘pwd’ stands for ______ directory.
print working
What does the ‘tr’ command do?
Translates or deletes characters
True or False: The ‘stat’ command displays file or filesystem status.
True
What command is used to search for files by name?
locate
Fill in the blank: The command ‘gzip -d’ is used to ______ files.
decompress
What does the ‘wc’ command do?
Counts lines, words, and characters in a file
True or False: The ‘history -c’ command clears the command history.
True
What command is used to create a compressed archive using bzip2?
bzip2
Fill in the blank: The command ‘chattr’ changes file ______ in Linux.
attributes
What does the ‘uname -m’ command display?
Machine hardware name
True or False: The ‘echo’ command can output text to the terminal.
True
What command is used to check the system uptime?
uptime
Fill in the blank: The command ‘ls -l’ provides a ______ listing of files.
detailed
What does the ‘diff’ command do?
Compares files line by line
True or False: The ‘shutdown’ command can be used to power off the system.
True
What command is used to display the contents of a compressed tar file?
tar -xvf filename.tar.gz
Fill in the blank: The command ‘tail -n 10’ shows the last ______ lines of a file.
10
What does the ‘basename’ command do?
Removes the directory and suffix from filenames
True or False: The ‘watch’ command executes a program periodically, showing output.
True
What command is used to view the last entries in system logs?
journalctl -xe
What does (.) represents?
Current directory
What does (..) represent?
Parent directory
Meaning the option -L and argument 2 in
tree /home -L 2
-L stands for ‘length’ and 2 is it’s value
What do you have to add if you want to write an argument with spaces?
Double “ “ or single ‘ ‘ quotations.
What does ~ represent?
Current directory
What does # represent?
Comment or Trim String
What does / represent?
Path directory separator
What does | represent?
Pipe
What do <> represent?
Input or output redirection
What do () represent?
Group commands - subshell
What does ! represent?
Pipeline logical NOT
What do {} represent?
Group commands - no subshell
What does $ represent?
Variable expressions
What does & represent?
Background process
What does * represent?
Character sequence wildcard
What do [ ] represent?
Character set wildcard
What does “?” represent?
Single character wildcard
