| cat |
View filecontent Concatenate file from start to standard output (terminal screen by default). Usually takes filename as a parameter.
cat > file
(Enter text at command line and then CTRL-D to write to file.) |
| cd |
Change directories. |
| chmod |
Changing file modes (permission) |
| clear |
Equivalent of CLS command in MS-DOS and in Windows command prompt. |
| cp |
cp oldfile newfile
Make a copy of the file oldfile in the current directory. The copy is named |
| crontab -e |
Schedule -tasks |
| dd |
create ISO images and floppy images |
| df -h |
Print disk partitions (with human readable switch) |
| du |
Display usage in kilobytes for contents of the current directory or for a specified file or directory.
du /bin
Show how much disk space is used by the /bin directory. |
| fdisk |
Command line disk partitioning program in Linux. |
| find |
The find utility is used much in the same way as many Windows people used the DIR command. |
| findnic |
Send network traffic from a specified network adapter |
| grep |
Search for a string from standard input or from a file. This is a powerful command.
ls /home -Rla | grep StringToSerach |
| history | tail |
View Last 10 commands
History normally list your past commands, used with tail it will filter to show only the last 10 |
| less |
Display the contents of a specified file one screen at a time. Use the arrow keys to move up and down through the file.less myfile
Display the contents of the file myfile. |
| ll |
Same as ls ?al |
| ls |
LiSt files in a directory. |
| lsmode |
shows information about all loaded modules |
| lspci |
List PCI devices |
| man |
Displays the manual page for a specified command. Press the spacebar to go to the next screen of text. Press q to exit from the display when you are finished.
man cat
Display the manual page for the command cat.
Exit wit q |
| mkdir |
Makes a directory.
mkdir /data
Creates directory /data for the configs. |
| modinfo |
Displays the option of a loaded module. modinfo e1000 Will produce a list of possible setting on the Network adapter as flow controlWith vmkload_mod -l you can list all loaded |
| mount|umount |
mount/umount CDs, floppies, local partitions, and remote directories to a selected local directory. |
| more |
Display the contents of a specified file one screen at a time. |
| more | less |
These commands are almost the same, and usually act in a pipe. |
| mv |
Moves and/or renames files and/or directories. |
| nano |
Edit a file with a bit easier UI that vi. |
| netstat |
Shows currently active network connections |
| passwd |
Changes the password for the userid. |
| pidof |
Finds the PID of a named process.pidof vmware-ccagent |
| ps -ef |
Show running processes in the service console. |
| pwd |
Show the path to the present working directory. |
| reboot |
Prints the manual page for a command or a configuration file entered as a parameter to this command. |
| route |
Modify or print routing table. |
| rm |
This is the equivalent of the MS-DOS or Windows command DEL. In other words, this tool deletes files. |
| rpm |
Red Hat Package Manager |
| scp |
scp secure copy Copies files between linux hosts |
| showmount |
showmount lists all the clients that have remotely mounted a filesystem from host. |
| service |
RedHat-made tool for daemon (service) |
| su |
Switch user. |
| tail -f |
Like “head”, but start from the end of the file.
Practical command to follow what is happening with a log file is command like
tail -f /var/log/messages.
tail -n
shows n lines of a files |
| tar |
Tape ARchive, a command which combines many files into one for backup purposes. |
| top |
Shows the running processes in the service console and lists the top consumers of CPU time. |
| vi |
Standard UNIX text editor. |
| vdf -h |
Displays free space for all mounted file systems. (VMware) |
| vmware -v |
Display ESX Version Number. (VMware) |
| which |
shows the path to the executeable
#which nano
/usr/bin/nano |
| & |
Run process in background by adding at the end of the command |
