Here is an alphabetized list of references to each Linux utility or shell built-in where it is described in this book.
Name | Synopsis | Described on page |
|---|
alias | display or define command aliases | 217, 255, 308 |
ar | archive files | 408 |
at | run commands at a future time | 130 |
bg | run or resume a process in the background | 274 |
builtin | run the specified built-in shell command even if a function of the same name is defined | 234 |
cancel | cancel a print job | 64 |
case | test a set of expressions | 226 |
cat | display or concatenate the contents of a file | 54 |
cd | change your current working directory to a new directory | 59, 238, 284 |
chdir | change current working directory | 329 |
chgrp | change a file's group | 73 |
chmod | change a file's mode (protection specification) | 74 |
chown | change a file's owner | 76 |
chsh | change login shell | 169 |
clear | clear the screen | 45 |
cmp | compare files | 116 |
cp | copy a file | 61 |
cpio | archive files | 122 |
crontab | add or remove commands for scheduled execution via cron | 128 |
date | print the date and time | 44 |
declare | define a variable or variable array | 209 |
df | display a table of free disk space | 581 |
diff | display differences between files | 117 |
dirs | list the contents of the directory stack | 239, 330 |
du | display disk usage information | 582 |
dump | dump the contents of a file system to backup media | 127 |
echo | print text | 171 |
egrep | similar to grep | 109 |
emacs | screen editor | 93 |
env | display environment variables or designate a shell variable as an environment variable and assign a value | 212, 252 |
eval | execute output of a command as a shell command itself | 197 |
exec | replace the current process with a new program | 198 |
exit | terminate the shell process | 196 |
export | display environment variables or designate a shell variable as an environment variable | 212, 251 |
fc | edit and re-execute commands in the Korn shell | 260 |
fg | run or resume a process in the foreground | 275 |
fgrep | similar to grep | 109 |
file | display type of a file | 70 |
find | find files | 119 |
finger | display information about users on the system | 346 |
for | process a loop | 229 |
foreach | process in a loop | 315 |
fsck | check the file system for consistency problems | 581 |
ftp | transfer files to another system via the File Transfer Protocol | 352 |
function | define function | 232, 269 |
gawk | sophisticated text processor | 132 |
gcc | compile a C program | 402 |
gdb | debug a program | 420 |
glob | print variables after they've been processed by the shell's metacharacter mechanisms | 329 |
goto | transfer control to a specified location in a script | 315 |
gprof | profile an executable program | 418 |
grep | filter lines of text based on patterns | 109 |
groups | list groups of which user is a member | 73 |
gunzip | GNU utility to restore a compressed file to its original contents | 141 |
gzip | GNU utility to compress the contents of a file | 141 |
head | display the beginning of a file | 57 |
history | display shell command history | 218, 311 |
host | find IP address or hostname via DNS | 365 |
hostname | display or set the hostname of the system | 346 |
if | test a set of expressions | 228, 316 |
ifconfig | configure a network interface | 589 |
jobs | display a list of running jobs belonging to the current shell | 240, 273 |
kill | send a signal to a process | 192, 242, 275 |
let | perform integer arithmetic | 265 |
ln | create links to files | 137 |
local | define a shell variable to be inaccessible outside the current function | 234 |
logout | terminate a login shell | 328 |
lp | print a file | 64 |
lpq | display status of printer queue | 66 |
lpr | queue print a file | 65 |
lprm | remove a queued print job | 66 |
lpstat | get printer status | 64 |
ls | list directory contents | 55 |
mail | send and receive electronic mail messages | 99 |
make | tool to build applications based on dependencies of modified files | 412 |
man | display manual pages | 45 |
mesg | allow or disallow write access to your tty device by other users | 347 |
mkdir | create a new directory | 58 |
mkfifo | create a named pipe | 505 |
mkfs | create a file system | 583 |
mknod | create a device node | 588 |
more | display a file one page at a time | 57 |
mount | mount a file system | 150 |
mv | move or rename a file | 58 |
newgrp | change a user's group membership | 77 |
nice | change a process' priority | 327 |
nohup | make a process immune to a SIGHUP (hangup signal) | 191, 327 |
notify | inform about changes in job's state | 328 |
od | octal dump | 148 |
onintr | process an interrupt | 317 |
passwd | change your password | 49 |
perl | flexible scripting language | 152 |
popd | pop a directory from the directory stack | 239, 330 |
print | print text to the terminal or an output stream | 287 |
ps | display process status | 189 |
pushd | push a directory onto the directory stack | 239, 330 |
pwd | print the current working directory | 52 |
rcp | copy files to a remote host | 351 |
read | read one line from standard input | 211, 288 |
readonly | designate a shell variable unchangeable | 213, 252 |
rehash | rebuild the shell's hash table | 331 |
repeat | repeat a command multiple times | 318 |
restore | restore files backed up with the dump utility | 127 |
return | return from a function | 233, 270 |
rlogin | login to a remote system | 355 |
rm | remove a file | 63 |
rmdir | remove a directory | 62 |
rpm | install a Linux package | 587 |
rsh | execute a shell command on a remote system | 356 |
scp | securely copy files to a remote host | 351 |
sed | stream editor | 142 |
select | create menu selection | 236, 267 |
set | display or set shell options | 220, 285, 298 |
setenv | define an environment variable | 302 |
sftp | securely transfer files to another system via the File Transfer Protocol | 352 |
shift | shift the shell's positional parameters | 198 |
shutdown | shut down the system | 580 |
sleep | cause a process to be idle | 189 |
slogin | securely log in to a remote system | 355 |
sort | sort lines in a file | 113 |
source | execute shell commands from a file in the current shell | 236, 329 |
ssh | securely execute a shell command on a remote system | 356 |
stop | stop a process | 326 |
strip | remove debugging and profiling information from binary to make it smaller | 429 |
stty | display and modify terminal settings | 81 |
su | become a new user | 140 |
suspend | suspend a process | 327 |
switch | branch based on expression | 318 |
tail | display the end of a file | 57 |
talk | carry on a real-time conversation with another user via the screen | 349 |
tar | archive files | 124 |
tee | write text to standard output as well as to a file | 177 |
telnet | connect to another system to login | 357 |
time | display time used by a program | 151 |
touch | update modification time of files | 416 |
tr | translate characters | 146 |
trap | catch signals | 231, 289 |
tset | determine and/or set terminal type | 78 |
tty | display device name of terminal | 151 |
typeset | format shell variables | 281 |
ul | change underlining so it displays properly | 147 |
umask | display or set the shell's umask value | 200 |
umount | unmount a file system | 150 |
unalias | remove a defined command alias | 217, 256, 309 |
unhash | disable the shell's hashing capability | 331 |
uniq | eliminate redundant text | 112 |
unset | deallocate a variable | 211 |
until | process in a loop | 230 |
useradd | add a user to the system | 584 |
userdel | delete a user from the system | 584 |
users | display users on the system | 344 |
vim | screen editor | 82 |
w | display information about local users on the system | 345 |
wait | wait for a child process to terminate | 193 |
wall | write to all users | 350 |
wc | count words in a file | 67 |
while | process in a loop | 230, 320 |
who | display users on the system | 345 |
whoami | display user information | 139 |
write | write a message to another user's screen | 348 |
xclock | clock tool for the X Window System | 390 |
xhost | defines access to the local X server by users of other systems | 379 |
xrdb | query and modify the X server's resource database | 396 |
xterm | terminal window client for the X Window System | 391 |
zcat | GNU utility to produce the original contents of a compressed file | 141 |
