apropos | Search Help manual pages (man -k) |
apt-get | Search for and install software packages (Debian) |
aptitude | Search for and install software packages (Debian) |
aspell | Spell Checker |
awk | Find and Replace text, database sort/validate/index |
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 files |
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 |
chkconfig | System services (runlevel) |
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 and 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 |
echo | Display message on screen |
egrep | Search files for lines that match an extended expression |