ubuntu:bash:commands
Differences
This shows you the differences between two versions of the page.
| ubuntu:bash:commands [2019/11/29 00:40] – created peter | ubuntu:bash:commands [2019/12/07 01:35] (current) – removed peter | ||
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| - | ====== Commands ====== | ||
| - | |||
| - | ===== System ===== | ||
| - | |||
| - | | ^Command^ | ||
| - | |Display linux system information|uname -a| | ||
| - | |Display kernel release information|uname -r| | ||
| - | |Show how long a system has been running|uptime| | ||
| - | |||
| - | ---- | ||
| - | |||
| - | ===== Archiving / Compression ===== | ||
| - | |||
| - | | ^Command^ | ||
| - | |Create a tar file containing a directory|tar cf home.tar /home| | ||
| - | |Create a tar file with gzip compression|tar czf tarfile.tar.gz files| | ||
| - | |Extract files from a tar file|tar xf filename.tar| | ||
| - | |Compress file and rename it to filename.gz|gzip filename| | ||
| - | |||
| - | ---- | ||
| - | |||
| - | ===== Booting ===== | ||
| - | |||
| - | | ^Command^ | ||
| - | |Show boot messages|dmesg| | ||
| - | |Show system reboot history|last reboot| | ||
| - | |||
| - | ---- | ||
| - | |||
| - | ===== Date and Time ===== | ||
| - | |||
| - | | ^Command^ | ||
| - | |Show current date and time|date| | ||
| - | |||
| - | ---- | ||
| - | |||
| - | ===== File and Disk ===== | ||
| - | |||
| - | | ^Command^ | ||
| - | |Display all information on files and directories|ls -a| | ||
| - | |Show path of current directory|pwd| | ||
| - | |Create a directory|mkdir dirname| | ||
| - | |Delete a file|rm filename| | ||
| - | |Delete a directory recursively|rm -r dirname| | ||
| - | |Forcefully delete a file|rm -f filename| | ||
| - | |Forcefully delete a directory recursively|rm -rf dirname| | ||
| - | |Copy file1 to file2|cp file1 file2| | ||
| - | |Copy directory1 to directory2, create directory2 if it does not exist|cp -r dirname1 dirname2| | ||
| - | |Create a symbolic link to a filename|ln -s / | ||
| - | |Create or update a file|touch filename| | ||
| - | |Place standard input into a file|cat > filename| | ||
| - | |Output contents of file|more file| | ||
| - | |Output first 10 lines of file|head file| | ||
| - | |Output last 10 lines of file|tail file| | ||
| - | |Output contents of file as it grows starting with last 10 lines|tail -f filename| | ||
| - | |Encrypt file|gpg -c filename| | ||
| - | |Decrypt file|gpg filename.gpg| | ||
| - | |Print the number of chars, words and lines in a file|wc filename| | ||
| - | |Execute command lines from standard input|xargs| | ||
| - | |Change permission of a file|chmod 666 filename| | ||
| - | |||
| - | ---- | ||
| - | |||
| - | ===== Disk Usage ===== | ||
| - | |||
| - | | ^Command^ | ||
| - | |Show free space on mounted filesystems|df -h| | ||
| - | |Show free inodes on mounted filesystems|df -i| | ||
| - | |Show disk partition sizes and types|fdisk -l| | ||
| - | |Display disk usage|du -ah| | ||
| - | |Display total disk usage on the current directory|du -sh| | ||
| - | |Display mount points for all filesystems|findmnt| | ||
| - | |Mount a device|mount device-path mount-point| | ||
| - | |||
| - | ---- | ||
| - | |||
| - | ===== File Transfer ===== | ||
| - | |||
| - | | ^Command^ | ||
| - | |Secure copy file to host|scp file.txt server2:/ | ||
| - | |Synchronize source to destination|rsync -a /home/peter /backup/| | ||
| - | |||
| - | |||
| - | ---- | ||
| - | |||
| - | ===== Hardware ===== | ||
| - | |||
| - | | ^Command^ | ||
| - | |Display CPU information|cat / | ||
| - | |List the number of interupts per CPU per I/O device|cat / | ||
| - | |List hardware configuration information|lshw| | ||
| - | |Display block device related information|lsblk| | ||
| - | |Display PCI devices|lspci -tv| | ||
| - | |Show USB devices|lsusb -tv| | ||
| - | |Show BIOS information|dmidecode| | ||
| - | |Show disk information|hdparm -i /dev/sda| | ||
| - | |Perform a disk speed test|hdparm -tT /dev/sda| | ||
| - | |Test for unreadable blocks on a disk|badblocks -s /dev/sda| | ||
| - | |||
| - | ---- | ||
| - | |||
| - | ===== Login ===== | ||
| - | |||
| - | | ^Command^ | ||
| - | |Connect to host as user|ssh user@host| | ||
| - | |Connect to host using specific port|ssh -p port user@host| | ||
| - | |Connect to host using telnet port|telnet host| | ||
| - | |||
| - | ---- | ||
| - | |||
| - | ===== Memory ===== | ||
| - | |||
| - | | ^Command^ | ||
| - | |Display used and free memory|free -m| | ||
| - | |||
| - | ---- | ||
| - | |||
| - | ===== Network ===== | ||
| - | |||
| - | | ^Command^ | ||
| - | |Show the system hostname|hostname| | ||
| - | |Display IP address of the host|hostname -i| | ||
| - | |Display all network interfaces and IP addresses|ip addr show| | ||
| - | |Display network interfaces and IP addresses for an interface|ip addr show eth0| | ||
| - | |Set IP address|ip addr add 192.168.0.1 dev eth0| | ||
| - | |Delete IP address|ip addr del 192.168.0.193/ | ||
| - | |Show Ethernet status|ethtool eth0| | ||
| - | |Show Ethernet status|mii-tool eth0| | ||
| - | |Show Routing table|ip route show| | ||
| - | |Show the route packets will take|ip route get 192.168.0.1| | ||
| - | |Change default route|ip route add default via 192.168.0.2| | ||
| - | |Send echo request to test connection|ping host| | ||
| - | |Get who is information for the domain|whois domain| | ||
| - | |Get DNS information for the domain|dig domain| | ||
| - | |Get Reverse DNS information for the host|dig -x host| | ||
| - | |Lookup DNS IP address for the domain|host google.com| | ||
| - | |Lookup local IP address|hostname -i| | ||
| - | |Download a file|wget filename| | ||
| - | |Show all listening network ports|netstat -tulpn| | ||
| - | |Show network stats|ip -s link| | ||
| - | |Show network stats for an interface|ip -s -s link ls eth0| | ||
| - | |Show arp entries|ip neighbour| | ||
| - | |Monitor network messages|ip monitor all| | ||
| - | |Activate network interface|ip link set ppp0 up| | ||
| - | |Deactivate network interface|ip link set ppp0 down| | ||
| - | |Enable TCP Delayed Ack|ip route quickack| | ||
| - | |||
| - | ---- | ||
| - | |||
| - | ===== Packages ===== | ||
| - | |||
| - | | ^Command^ | ||
| - | |Install RPM based package|rpm -i pkgname.rpm| | ||
| - | |Remove package|rpm -e pgkname| | ||
| - | |Install from source|./ | ||
| - | |||
| - | ---- | ||
| - | |||
| - | ===== Process ===== | ||
| - | |||
| - | | ^Command^ | ||
| - | |Display your currently active processes|ps| | ||
| - | |Find all processes related to " | ||
| - | |Memory map of process|pmap| | ||
| - | |Display all running processes|top| | ||
| - | |Kill process with specific pid id|kill id| | ||
| - | |Kill all processes named xxx|kill xxx| | ||
| - | |Resumes suspended job without bringing them to the foreground|bg| | ||
| - | |Brings the most recent job to the foreground|fg| | ||
| - | |Bring job n to the foreground|fg n| | ||
| - | |||
| - | ---- | ||
| - | |||
| - | ===== Search ===== | ||
| - | |||
| - | | ^Command^ | ||
| - | |Search for a pattern in files|grep pattern files| | ||
| - | |Search recursively for pattern in directory|grep -r pattern directory| | ||
| - | |Find all instances of file|locate filename| | ||
| - | |Find filenames that start with xxx|find /home/peter -name ' | ||
| - | |Find filesnames larger than 10000k|find /home/peter -size +10000k| | ||
| - | |||
| - | |||
| - | ---- | ||
| - | |||
| - | ===== Users ===== | ||
| - | |||
| - | | ^Command^ | ||
| - | |Display who is logged in|w| | ||
| - | |Show who is logged into the system|who| | ||
| - | |Display who you are logged in as|whoami| | ||
| - | |Display information on a user|finger user| | ||
| - | |Show the active user id with login and group|id| | ||
| - | |Show last logins on the system|last| | ||
| - | |Add a group|groupadd groupname| | ||
| - | |Add a user|adduser peter| | ||
| - | |Add a user|useradd -c "Peter Roux" - g admin -m peter # Add user peter| | ||
| - | |Delete a user|userdel peter| | ||
| - | |Modify user information|usermod peter| | ||
| - | |||
| - | |||
ubuntu/bash/commands.1574988050.txt.gz · Last modified: 2020/07/15 09:30 (external edit)