A | B | C | D | E | F | G |
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Command | Description |
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apt-get | Search for and install software packages (Debian/Ubuntu) |
aptitude | Search for and install software packages (Debian/Ubuntu) |
aspell | Spell Checker |
awk | Find and Replace text, database sort/validate/index |
Command | Description |
---|---|
basename | Strip directory and suffix from filenames |
bash | GNU Bourne-Again SHell |
bc | Arbitrary precision calculator language |
bg | Send to background |
break | Exit from a loop • |
builtin | Run a shell builtin |
bzip2 | Compress or decompress named file(s) |
Command | Description | ||||||||||||||||||||||
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cal | Display a calendar | ||||||||||||||||||||||
case | Conditionally perform a command | ||||||||||||||||||||||
cat | Concatenate and print (display) the content of files | ||||||||||||||||||||||
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 | ||||||||||||||||||||||
chkconfig | System services (runlevel) | ||||||||||||||||||||||
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 | curl | Transfer data from or to a server | cut | Divide a file into several parts |
Command | Description |
---|---|
date | Display or change the date & time |
dc | Desk Calculator |
dd | Convert and copy a file, write disk headers, boot records |
ddrescue | Data recovery tool |
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 |
dig | DNS lookup |
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 |
dmesg | Print kernel & driver messages |
du | Estimate file space usage |
Command | Description |
---|---|
echo | Display message on screen • |
egrep | Search file(s) for lines that match an extended expression |
eject | Eject removable media |
enable | Enable and disable builtin shell commands • |
env | Environment variables |
ethtool | Ethernet card settings |
eval | Evaluate several commands/arguments |
exec | Execute a command |
exit | Exit the shell |
expect | Automate arbitrary applications accessed over a terminal |
expand | Convert tabs to spaces |
export | Set an environment variable |
expr | Evaluate expressions |
Command | Description |
---|---|
false | Do nothing, unsuccessfully |
fdformat | Low-level format a floppy disk |
fdisk | Partition table manipulator for Linux |
fg | Send job to foreground |
fgrep | Search file(s) for lines that match a fixed string |
file | Determine file type |
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 |
ftp | File Transfer Protocol |
function | Define Function Macros |
fuser | lookup and exit the process that is accessing a file |
Command | Description |
---|---|
gawk | Find and Replace text within file(s) |
getopts | Parse positional parameters |
grep | Search file(s) for lines that match a given pattern |
groupadd | Add a user security group |
groupdel | Delete a group |
groupmod | Modify a group |
groups | Print group names a user is in |
gzip | Compress or decompress named file(s) |