Oracle Linux is a Linux kernel-based operating system created by Oracle Corporation. It is popular for its excellent performance and compatibility with Oracle products such as Oracle Cloud Infrastructure, Oracle Middleware and Oracle Database. Oracle Linux has a wide range of commands for its highly integrated tasks. The Oracle Linux Commands Cheat Sheet of this article serves as a quick reference guide and organized list of commonly used commands.
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Oracle Linux Commands List
Oracle Linux commands refer to various commands and tools available in the Oracle Linux operating system. These commands can perform a wide range of tasks including administrating the operating system, managing files and directories, configuring system settings, etc. Moreover, Oracle Linux has highly integrated tools for interacting with Oracle databases and other Oracle products from the command line interface.
System Administration Commands
System administration commands allow users to manage system services, update software packages, check system performance, and many more. The following list contains frequently used system administration commands.
Like any other Linux distribution, Oracle Linux has various commands for managing files and directories. With these commands, users can easily navigate through files, search for files and directories, and perform various file operations. Oracle Linux system provides a wide range of process commands to manage and monitor system processes effectively. These commands allow users to list, kill, prioritize, and debug running processes as well as gather performance data and identify system bottlenecks. Each distribution of the Linux operating system has some commands dedicated to managing and troubleshooting network connections. These commands provide users the flexibility of changing network settings, monitoring network traffic, and diagnosing network problems from the command line. Commands under this section are very useful for managing files and archives in Oracle Linux. These types of Commands are available by default in most installations of the operating system. Every system has certain permission and security requirements. Oracle Linux has a variety of commands to secure the system and restrict unauthorized access of users to the system. Oracle Linux provides some commands that are specific to Oracle Products. These commands are very useful to manage and administer Oracle databases and related services. In conclusion, the Oracle Linux commands cheat sheet offers a comprehensive set of commands and their descriptions that can help users navigate and manage the Oracle Linux operating system efficiently. Please feel free to comment below if you find the list helpful or have any suggestions regarding it.Commands
Description
systemctl
Control the systemd system and service manager
service
Start, stop and check the status of system services
init
Start the system initialization process
shutdown
Shut down the system
reboot
Reboot the system
uname
Display system information, including the kernel version
ss
Display socket statistics
arp
Manipulate the system ARP cache
ethtool
Display or modify Ethernet device settings
firewall-cmd
Manage the firewall
lsmod
List currently loaded kernel modules
modprobe
Add or remove kernel modules
insmod
Insert a kernel module into the kernel
rmmod
Remove a kernel module
dmesg
Display kernel message buffer
journalctl
Query and display system journal logs
free
Display memory usage information
df
Display disk usage information
du
Display disk usage of files and directories
mount
Mount file systems
umount
Unmount file systems
lsof
List open files
who
Display logged-in users
last
Display recent logins
history
Display command history
crontab
Edit and manage user cron jobs
at
Schedule commands to run at a specific time
rpm
Manage RPM packages
yum
Manage system packages
dnf
Manage system packages
su
Switch to another user account
sudo
Execute commands with superuser privileges
visudo
Edit the sudoers file
id
Display user and group information
w
Display who is logged in and what they are doing
whoami
Display the current user
hostnamectl
View and modify system hostname settings
sysctl
View and modify kernel parameters
ulimit
View and modify user resource limits
locale
View or modify locale settings
date
Display or modify the system date and time
alias
Creates a shortcut for a longer command
unalias
Removes previously created alias
File and Directory Management Commands
Commands
Description
ls
List the contents of a directory
cd
Change the current working directory
cd ~
Change the current working directory to the user’s home directory
pwd
Print the current working directory
mkdir
Create a new directory
rmdir
Remove an empty directory
touchÂ
Create an empty file or updates the modification time of an existing file
cp
Copy a file or directory
mv
Move or renames a file or directory
rm
Remove a file or directory
ln
Create a hard or symbolic link to a file
file
Determine the file type of a file
find
Search for files in a directory hierarchy
locate
Search for files in a database of file names and paths
split
Split a file into smaller files
join
Join two or more files together
wc
Count the number of lines, words, and characters in a file
cat  Â
Concatenate and displays files
head
Display the first few lines of a file
tail
Display the last few lines of a file
less
Display the contents of a file one page at a time
more
Display the contents of a file one screenful at a time
diff
Compare two files and displays the differences
cmp
Compare two files byte by byte and displays the first differing byte
patch
Apply a patch file to a file or set of files
sort
Sort the lines of a file
uniq
Remove duplicate lines from a sorted file
cut
Extract columns or fields from a file
paste
Merge lines from multiple files
tr
Translate or deletes characters from a file
sed
Edit a file using regular expressions
awk
Process text files and generates reports
grep
Search for a pattern in a file
egrep
Search for an extended regular expression pattern in a file
fgrep
Search for a fixed string pattern in a file
tree
Display the contents of a directory in a tree-like format
readlink
Display the value of a symbolic link
pushd
Add a directory to the directory stack and changes the current directory to the new directory
Process Commands
Commands
Description
ps
Display information about active processes on the system
top
Display real-time information about running processes
kill
Terminate a process using its process ID (PID)
pkill
Signal processes based on their name or other attributes
pgrep
Search for processes based on their name or other attributes and display their PIDs
nice
Set the priority of a process to control its CPU usage
renice
Change the priority of an already running process
killall
Terminate multiple processes based on their name
htop
Display real-time information about processes in a more interactive way than top
pstree
Display a tree-like representation of running processes and their parent-child relationships
pidof
Find the PID of a running process based on its name
vmstat
Display virtual memory statistics and other system performance metrics
strace
Trace system calls and signals made by a process and their results
fuser
Identify processes using specific files or directories
watch
Execute a command repeatedly and display its output in real-time
uptime
Display system uptime and load average
iostat
Display input/output statistics for devices and partitions
sar
Collect and report system activity information, including CPU, memory, and disk usage
mpstat
Display processor related statistics
nmon
Display system performance information in real-time
dstat
Display system resource usage and other statistics in real-time
atop
Display system resource usage and other statistics in real time with advanced features
schedstat
Display scheduler statistics for tasks and threads
numastat
Display NUMA (Non-Uniform Memory Access) statistics
sched_debug
Display scheduler debugging information
slabtop
Display kernel slab cache information
Network Commands
Commands
Description
ifconfig
Display network interface configuration information
ip
Configure and display network interfaces, routing, and tunnels
route
View and manipulate the IP routing table
ping
Test connectivity to a network host using the ICMP protocol
traceroute
Trace the network path to a remote host
nslookup
Query DNS servers to retrieve domain name or IP address information
dig
Query DNS servers for DNS records
host
Perform DNS lookups and retrieve domain name or IP address information
netstat
Display network connections, routing tables, and network interface statistics
ss
Display network sockets and related information
telnet
Establish a connection to a remote host using the Telnet protocol
ssh
Establish a secure shell connection to a remote host
scp
Securely copy files between hosts
sftp
Securely transfer files between hosts using the FTP protocol
ftp
Transfer files to and from a remote FTP server
wget
Download files from the internet using various protocols
curl
Transfer data from or to a server, using one of the supported protocols
nmap
Perform network exploration and security auditing
tcpdump
Capture network packets and analyze network traffic
iptables
Configure and manage the netfilter firewall and packet filtering framework
Archive Commands
Commands
Description
tar
Create and manipulate tar archives
tar -cf
Create a tar archive file
tar -xf
Extract files from a tar archive
tar -zcvf
Create a compressed tar archive (also known as a .tar.gz file)
gunzip
Decompress a .gz file
rar
Create and manipulate RAR archives
unrar
Extract files from a RAR archive
unzip
Extract files from a ZIP archive
bzip2
Compress files using the bzip2 algorithm
gzip
Compress files using the gzip algorithm
xz
Compress files using the xz algorithm
p7zip
Create and extract 7-Zip archives
pax
Create, extract and list tar, cpio, and pax archives
cpio
Create and extract cpio archives
shar
Create a shell archive, which is a shell script that can be used to extract files
ar
Create and extract archives in the Unix ar format, which is typically used for libraries
zip
Creates, views, and extracts files from a compressed archive file
Security and Permission Commands
Commands
Description
chmod
Change the permissions of files and directories
chown
Change the owner and group of files and directories
chgrp
Change the group ownership of files and directories
passwd
Change the password of a user account
sudo
Execute commands with administrative privileges
useradd
Create a new user account
usermod
Modify an existing user account
userdel
Delete a user account
groupadd
Create a new group
groupmod
Modify an existing group
groupdel
Delete a group
umask
Set the default file permissions for new files and directories
passwd -l
Lock a user account
passwd -u
Unlock a user account
firewall-cmd
Manage the firewall configuration
sestatus
Check the status of SELinux (Security-Enhanced Linux)
setenforce
Enable or disable SELinux enforcement mode
getenforce
Check the current SELinux enforcement mode
Oracle-specific Commands
Commands
Description
asmcmd
Manage Oracle Automatic Storage Management (ASM) instances and disk groups
crsctl
Manage Oracle Clusterware components and resources
dbca
Create and configure Oracle databases
dcli
Execute commands across multiple Oracle database servers simultaneously
dcsctl
Manage Oracle Database Cloud Services instances
expdp
Export and import Oracle database objects and data
impdp
Export and import Oracle database objects and data
lsnrctl
Manage Oracle database listener services
oemctl
Manage and monitor Oracle databases, middleware, and applications
oerr
Display Oracle error messages and their meanings
oracleasm
Manage Oracle ASM devices and disk groups
orachk
Diagnose and troubleshoot issues on Oracle systems
orapki
Manage Oracle wallets and certificates
sqlplus
Connect to and manage Oracle databases from the command line
srvctl
Manage Oracle services and instances
tnsping
Test the connectivity to an Oracle database listener
Conclusion
