paulredmond · May 10, 2025 11:05 · Jun 13, 2016 · Jun 13, 2016 · Jun 13, 2016 · Jun 13, 2016
diff --git a/linux-cheat-sheet.md b/linux-cheat-sheet.md
@@ -184,7 +184,7 @@ mount device-path mount-point # Mount a device
 ## Directory Traversal
 
 ```bash
-cd .. # Go up one level of the directory tree
-cd    # Go to the $HOME directory
+cd ..    # Go up one level of the directory tree
+cd       # Go to the $HOME directory
 cd /test # Change to the /test directory
 ```
diff --git a/linux-cheat-sheet.md b/linux-cheat-sheet.md
@@ -157,17 +157,34 @@ rsync -a /home/apps /backup/ # Sync source to destination
 ## Process Related
 
 ```bash
-
+ps                      # Display your currently active process
+ps aux | grep 'telnet'  # Find all process id's related to telnet process
+pmap                    # Memory map of process
+top                     # Display all running processes
+kill pid                # Kill process with mentioned pid id
+killall proc            # Kill all processes named proc
+pkill process-name      # Send signal to a process with its name
+bg                      # Resumes suspended jobs without bringing them to the foreground
+fg                      # Brings the most recent job to the foreground
+fg n                    # Brings job n to the foreground
 ```
 
 ## Disk Usage
 
 ```bash
-
+df -h      # Show free space on mounted filesystems
+df -i      # Show free inodes on mounted filesystems
+fdish -l   # Show disk partition sizes and types
+du -ah     # Display disk usage in human readable form
+du -sh     # Display total disk usage on the current directory
+findmnt    # Displays target mount point for all filesystems
+mount device-path mount-point # Mount a device
 ```
 
 ## Directory Traversal
 
 ```bash
-
+cd .. # Go up one level of the directory tree
+cd    # Go to the $HOME directory
+cd /test # Change to the /test directory
 ```
diff --git a/linux-cheat-sheet.md b/linux-cheat-sheet.md
@@ -139,13 +139,19 @@ find /home -size +10000k       # Find files larger than 10000k in /home
 ## Login (SSH and Telnet)
 
 ```bash
-
+ssh user@host          # Connect to a host as a user
+ssh -p port user@host  # Connect to a host using a specific port
+telnet host            # Connect to the system using telnet port
 ```
 
 ## File Transfer
 
 ```bash
+# scp
+scp file.txt server2:/tmp    # Secure copy file.txt to remote host /tmp folder
 
+# rsync
+rsync -a /home/apps /backup/ # Sync source to destination
 ```
 
 ## Process Related
@@ -154,6 +160,12 @@ find /home -size +10000k       # Find files larger than 10000k in /home
 
 ```
 
+## Disk Usage
+
+```bash
+
+```
+
 ## Directory Traversal
 
 ```bash

diff --git a/linux-cheat-sheet.md b/linux-cheat-sheet.md
@@ -128,10 +128,34 @@ xargs                 # Execute command lines from standard input
 
 ## Search
 
+```bash
+grep pattern file              # Search for patterns in a file
+grep -r pattern dir/           # Search recursively for a pattern in a dir
+locate file                    # Find all instances of a file
+find /home/tom -name 'index*'  # Find file names that start with index
+find /home -size +10000k       # Find files larger than 10000k in /home
+```
+
 ## Login (SSH and Telnet)
 
+```bash
+
+```
+
 ## File Transfer
 
+```bash
+
+```
+
 ## Process Related
 
-## Directory Traversal
+```bash
+
+```
+
+## Directory Traversal
+
+```bash
+
+```
diff --git a/linux-cheat-sheet.md b/linux-cheat-sheet.md
@@ -108,22 +108,22 @@ pwd                   # Show the path of the current directory
 mkdir directory-name  # Create a directory
 rm file-name          # Delete a file
 rm -r directory-name  # Delete a directory recursively
-rm -f file-name                    # Forcefully remove a file
-rm -rf directory-name              # Forecfully remove the directory structure
-cp file1 file2                     # Copy file1 to file2
-cp -r dir1 dir2                    # Copy dir1 to dir2, create dir2 if it doesn't exist
-mv file1 file2                     # Rename source to dest / move the source to directory
+rm -f file-name       # Forcefully remove a file
+rm -rf directory-name # Forecfully remove the directory structure
+cp file1 file2        # Copy file1 to file2
+cp -r dir1 dir2       # Copy dir1 to dir2, create dir2 if it doesn't exist
+mv file1 file2        # Rename source to dest / move the source to directory
 ln -s /path/to/file-name link-name # Create a symbolic link to file-name
-touch file
-cat > file
-more file
-head file
-tail file
-tail -f file
-gpg -c file
-gpg file.gpg
-wc
-xargs
+touch file            # Create or update a file
+cat > file            # Place standard input into a file
+more file             # Output contents of a file
+head file             # Output first 10 lines of a file
+tail file             # Output last 10 lines of a file
+tail -f file          # Output the contents of file as it grows starting with the last 10 lines
+gpg -c file           # Encrypt file
+gpg file.gpg          # Decrypt file
+wc                    # Print the number of bytes, words, and lines of a file
+xargs                 # Execute command lines from standard input
 ```
 
 ## Search

diff --git a/linux-cheat-sheet.md b/linux-cheat-sheet.md
@@ -103,17 +103,17 @@ make install
 ## File Commands
 
 ```bash
-ls -al
-pwd
-mkdir directory-name
-rm file-name
-rm -r directory-name
-rm -f file-name
-rm -rf directory-name
-cp file1 file2
-cp -r dir1 dir2
-mv file1 file2
-ln -s /path/to/file-name link-name
+ls -al                # Display all information about files/directories
+pwd                   # Show the path of the current directory
+mkdir directory-name  # Create a directory
+rm file-name          # Delete a file
+rm -r directory-name  # Delete a directory recursively
+rm -f file-name                    # Forcefully remove a file
+rm -rf directory-name              # Forecfully remove the directory structure
+cp file1 file2                     # Copy file1 to file2
+cp -r dir1 dir2                    # Copy dir1 to dir2, create dir2 if it doesn't exist
+mv file1 file2                     # Rename source to dest / move the source to directory
+ln -s /path/to/file-name link-name # Create a symbolic link to file-name
 touch file
 cat > file
 more file

diff --git a/linux-cheat-sheet.md b/linux-cheat-sheet.md
@@ -102,6 +102,30 @@ make install
 
 ## File Commands
 
+```bash
+ls -al
+pwd
+mkdir directory-name
+rm file-name
+rm -r directory-name
+rm -f file-name
+rm -rf directory-name
+cp file1 file2
+cp -r dir1 dir2
+mv file1 file2
+ln -s /path/to/file-name link-name
+touch file
+cat > file
+more file
+head file
+tail file
+tail -f file
+gpg -c file
+gpg file.gpg
+wc
+xargs
+```
+
 ## Search
 
 ## Login (SSH and Telnet)

diff --git a/linux-cheat-sheet.md b/linux-cheat-sheet.md
@@ -74,4 +74,40 @@ useradd \            # Create user "sam"
 userdel sam          # Delete user sam
 adduser sam          # Add user "sam"
 usermod              # Modify user information
-```
+```
+
+## Compression / Archives
+
+```bash
+tar cf home.tar home        # Create tar named home.tar containing home/
+tar xf file.tar             # Extract the files from file.tar
+tar czf file.tar.gz files   # Create a tar with gzip compression
+gzip file                   # Compress file and renames it to file.gz
+```
+
+## Install Package
+
+```bash
+rpm -i pkgname.rpm  # Install RPM based package
+rpm -e pkgname      # Remove package
+```
+
+## Install from Source
+
+```bash
+./configure
+make
+make install
+```
+
+## File Commands
+
+## Search
+
+## Login (SSH and Telnet)
+
+## File Transfer
+
+## Process Related
+
+## Directory Traversal
diff --git a/linux-cheat-sheet.md b/linux-cheat-sheet.md
@@ -59,4 +59,19 @@ host google.com  # Lookup DNS IP address for the name
 hostname -i      # Lookup local IP address
 wget file        # Download file
 netstat -tupl    # List all active listening ports
+```
+
+## Users
+
+```bash
+id                   # Show the active user id with login and group
+last                 # Show last logins on the system
+who                  # Show who is logged on the system
+groupadd admin       # Add group "admin"
+useradd \            # Create user "sam"
+  -c "Sam Tomshi" \
+  -g admin -m sam
+userdel sam          # Delete user sam
+adduser sam          # Add user "sam"
+usermod              # Modify user information
 ```
diff --git a/linux-cheat-sheet.md b/linux-cheat-sheet.md
@@ -42,4 +42,21 @@ dmidecode             # Show hardware info from the BIOS
 hdparm -i /dev/sda    # Show info about disk sda
 hdparm -tT /dev/sda   # Do a read speed test on disk sda
 badblocks -s /dev/sda # Test for unreadable blocks on disk sda
+```
+
+## Network
+
+```bash
+ip address add 192.168.0.1 dev eth0 # Set an IP Address
+ip addr show     # Display all network interfaces and ip address
+ethtool eth0     # Linux tool to show ethernet status
+mii-tool eth0    # Linux tool to show ethernet status
+ping host        # Send echo request to test connection
+whois domain     # Get Whois information for domain
+dig domain       # Get DNS information for domain
+dig -x host      # Reverse lookup host
+host google.com  # Lookup DNS IP address for the name
+hostname -i      # Lookup local IP address
+wget file        # Download file
+netstat -tupl    # List all active listening ports
 ```
diff --git a/linux-cheat-sheet.md b/linux-cheat-sheet.md
@@ -24,4 +24,22 @@ chmod 775 /data/test.c   # Set rwx permission for owner, rx for group and world
 chown owner-user file    # Change owner of the file
 chown owner-user:owner-group file-name  # Change owner and group owner of the file
 chown owner-user:owner-group directory/ # Change owner and group owner of the directory
+```
+
+## Hardware
+
+```bash
+dmesg                 # Detected hardware and boot messages
+cat /proc/cpuinfo     # CPU Model
+cat /proc/meminfo     # Hardware memory
+cat /proc/interrupts  # Lists the number of interrupts per CPU per I/O device
+lshw                  # Displays information on hardware configuration of the system
+lsblk                 # Displays block device related information in Linux
+free -m               # Used and free memory (-m for MB)
+lspci -tv             # Show PCI Devices
+lsusb -tv             # Show USB Devices
+dmidecode             # Show hardware info from the BIOS
+hdparm -i /dev/sda    # Show info about disk sda
+hdparm -tT /dev/sda   # Do a read speed test on disk sda
+badblocks -s /dev/sda # Test for unreadable blocks on disk sda
 ```
diff --git a/linux-cheat-sheet.md b/linux-cheat-sheet.md
@@ -12,4 +12,16 @@ cal          # Show this month calendar
 w            # Display who is online
 whoami       # Who you are logged in as
 finger user  # Display information about user
+```
+
+## File Permission Related
+
+```bash
+chmod octal file-name    # Change the permissions of the file to octal
+# Example
+chmod 777 /data/test.c   # Set rwx permission for owner, group, world
+chmod 775 /data/test.c   # Set rwx permission for owner, rx for group and world
+chown owner-user file    # Change owner of the file
+chown owner-user:owner-group file-name  # Change owner and group owner of the file
+chown owner-user:owner-group directory/ # Change owner and group owner of the directory
 ```
diff --git a/linux-cheat-sheet.md b/linux-cheat-sheet.md
@@ -0,0 +1,15 @@
+## System
+
+```bash
+uname -a     # Display Linux System Information
+uname -r     # Display kernel release information
+uptime       # Show how long the system has been running + load
+hostname     # Show system host name
+hostname -i  # Display the IP address of the host
+last reboot  # Show system reboot history
+date         # Show the current date and time
+cal          # Show this month calendar
+w            # Display who is online
+whoami       # Who you are logged in as
+finger user  # Display information about user
+```
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