About 200 Linux commands for serious newbies. To get more examples on how each command is used, use this command:
#>man commandname
Where commandname is an command you pick from the table below. If no manual exist, then that command is most likely unavailable for your Linux distro. Ignore it and proceed with other commands.
| alias | Create an alias |
| awk | Find and Replace text, database sort/validate/index |
| break | Exit from a loop |
| builtin | Run a shell builtin |
| cal | Display a calendar |
| case | Conditionally perform a command |
| cat | Display the contents of a file |
| cd | Change Directory |
| cfdisk | Partition table manipulator for Linux |
| chgrp | Change group ownership |
| chmod | Change access permissions |
| chown | Change file owner and group |
| chroot | Run a command with a different root directory |
| cksum | Print CRC checksum and byte counts |
| clear | Clear terminal screen |
| cmp | Compare two files |
| comm | Compare two sorted files line by line |
| command | Run a command - ignoring shell functions |
| continue | Resume the next iteration of a loop |
| cp | Copy one or more files to another location |
| cron | Daemon to execute scheduled commands |
| crontab | Schedule a command to run at a later time |
| csplit | Split a file into context-determined pieces |
| cut | Divide a file into several parts |
| date | Display or change the date & time |
| dc | Desk Calculator |
| dd | Data Dump - Convert and copy a file |
| declare | Declare variables and give them attributes |
| df | Display free disk space |
| diff | Display the differences between two files |
| diff3 | Show differences among three files |
| dir | Briefly list directory contents |
| dircolors | Colour setup for `ls' |
| dirname | Convert a full pathname to just a path |
| dirs | Display list of remembered directories |
| du | Estimate file space usage |
| echo | Display message on screen |
| ed | A line-oriented text editor (edlin) |
| egrep | Search file(s) for lines that match an extended expression |
| eject | Eject CD-ROM |
| enable | Enable and disable builtin shell commands |
| env | Display, set, or remove environment variables |
| eval | Evaluate several commands/arguments |
| exec | Execute a command |
| exit | Exit the shell |
| expand | Convert tabs to spaces |
| export | Set an environment variable |
| expr | Evaluate expressions |
| factor | Print prime factors |
| fdformat | Low-level format a floppy disk |
| fdisk | Partition table manipulator for Linux |
| fgrep | Search file(s) for lines that match a fixed string |
| find | Search for files that meet a desired criteria |
| fmt | Reformat paragraph text |
| fold | Wrap text to fit a specified width. |
| for | Expand words, and execute commands |
| format | Format disks or tapes |
| free | Display memory usage |
| fsck | File system consistency check and repair |
| function | Define Function Macros |
| gawk | Find and Replace text within file(s) |
| getopts | Parse positional parameters |
| grep | Search file(s) for lines that match a given pattern |
| groups | Print group names a user is in |
| gzip | Compress or decompress named file(s) |
| hash | Remember the full pathname of a name argument |
| head | Output the first part of file(s) |
| history | Command History |
| hostname | Print or set system name |
| id | Print user and group id's |
| if | Conditionally perform a command |
| import | Capture an X server screen and save the image to file |
| info | Help info |
| install | Copy files and set attributes |
| join | Join lines on a common field |
| kill | Stop a process from running |
| less | Display output one screen at a time |
| let | Perform arithmetic on shell variables |
| ln | Make links between files |
| local | Create variables |
| locate | Find files |
| logname | Print current login name |
| logout | Exit a login shell |
| look | Display lines beginning with a given string |
| lpc | Line printer control program |
| lpr | Off line print |
| lprint | Print a file |
| lprintd | Abort a print job |
| lprintq | List the print queue |
| lprm | Remove jobs from the print queue |
| ls | List information about file(s) |
| m4 | Macro processor |
| man | Help manual |
| mkdir | Create new folder(s) |
| mkfifo | Make FIFOs (named pipes) |
| mknod | Make block or character special files |
| more | Display output one screen at a time |
| mount | Mount a file system |
| mtools | Manipulate MS-DOS files |
| mv | Move or rename files or directories |
| nice | Set the priority of a command or job |
| nl | Number lines and write files |
| nohup | Run a command immune to hangups |
| passwd | Modify a user password |
| paste | Merge lines of files |
| pathchk | Check file name portability |
| ping | Test a network connection |
| popd | Restore the previous value of the current directory |
| pr | Prepare files for printing |
| printcap | Printer capability database |
| printenv | Print environment variables |
| printf | Format and print data |
| ps | Process status |
| pushd | Save and then change the current directory |
| pwd | Print Working Directory |
| quota | Display disk usage and limits |
| quotachec | k Scan a file system for disk usage |
| quotactl | Set disk quotas |
| ram | ram disk device |
| rcp | Copy files between two machines. |
| read | read a line from standard input |
| readonly | Mark variables/functions as readonly |
| remsync | Synchronize remote files via email |
| return | Exit a shell function |
| rm | Remove files |
| rmdir | Remove folder(s) |
| rpm | Remote Package Manager |
| rsync | Remote file copy (Synchronize file trees) |
| screen | Terminal window manager |
| sdiff | Merge two files interactively |
| sed | Stream Editor |
| select | Accept keyboard input |
| seq | Print numeric sequences |
| set | Manipulate shell variables and functions |
| shift | Shift positional parameters |
| shopt | Shell Options |
| shutdown | Shutdown or restart linux |
| sleep | Delay for a specified time |
| sort | Sort text files |
| source | Run commands from a file `.' |
| split | Split a file into fixed-size pieces |
| su | Substitute user identity |
| sum | Print a checksum for a file |
| symlink | Make a new name for a file |
| sync | Synchronize data on disk with memory |
| tac | Concatenate and write files in reverse |
| tail | Output the last part of files |
| tar | Tape ARchiver |
| tee | Redirect output to multiple files |
| test | Evaluate a conditional expression |
| time | Measure Program running time |
| times | User and system times |
| touch | Change file timestamps |
| top | List processes running on the system |
| tracerout | e Trace Route to Host |
| trap | Run a command when a signal is set(bourne) |
| tr | Translate, squeeze, and/or delete characters |
| tsort | Topological sort |
| tty | Print filename of terminal on stdin |
| type | Describe a command |
| ulimit | Limit user resources |
| umask | Users file creation mask |
| umount | Unmount a device |
| unalias | Remove an alias |
| uname | Print system information |
| unexpand | Convert spaces to tabs |
| uniq | Uniquify files |
| units | Convert units from one scale to another |
| unset | Remove variable or function names |
| unshar | Unpack shell archive scripts |
| until | Execute commands (until error) |
| useradd | Create new user account |
| usermod | Modify user account |
| users | List users currently logged in |
| uuencode | Encode a binary file |
| uudecode | Decode a file created by uuencode |
| v | Verbosely list directory contents (`ls -l -b') |
| vdir | Verbosely list directory contents (`ls -l -b') |
| vi | Text Editor |
| watch | Execute/display a program periodically |
| wc | Print byte, word, and line counts |
| whereis | Report all known instances of a command |
| which | Locate a program file in the user's path. |
| while | Execute commands |
| who | Print all usernames currently logged in |
| whoami | Print the current user id and name (`id -un') |
| xargs | Execute utility, passing constructed argument list(s) |
| yes | Print a string until interrupted |
| .period | Run commands from a file |
| ### | Comment / Remark |
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