Linux Command

sort
Function: sort lines of text files
Usage: sort [OPTION]... --files0-from=F
dd
Function: convert and copy a file
Usage: dd [OPERAND]...
tee
Function: Read from standard input and write to both standard output and files
Usage: tee [OPTION]... [FILE]...
lsof
Function: list open files
Usage: lsof [ -?abChlnNOPRtUvVX ] [ -A A ] [ -c c ] [ +c c ] [ +|-d d ] [ +|-D D ] [ +|-e s ] [ +|-E ] [ +|-f [cfgGn] ] [ -F [f] ] [ -g [s] ] [ -i [i] ] [ -k k ] [ -K k ] [ +|-L [l] ] [ +|-m m ] [ +|-M ] [ -o [o] ] [ -p s ] [ +|-r [t[m]] ] [ -s [p:s] ] [ -S [t] ] [ -T [t] ] [ -u s ] [ +|-w ] [ -x [fl] ] [ -z [z] ] [ -Z [Z] ] [ -- ] [names]
passwd
Function: update user’s authentication tokens
Usage: passwd [-k] [-l] [-u [-f]] [-d] [-e] [-n mindays] [-x maxdays] [-w warndays] [-i inactivedays] [-S] [--stdin] [username]
write
Function: send a message to another user
Usage: write user [ttyname]
echo
Function: display a line of text
Usage: echo [SHORT-OPTION]... [STRING]...
df
Function: report file system disk space usage
Usage: df [OPTION]... [FILE]...
mv
Function: move (rename) files
Usage: mv [OPTION]... [-T] SOURCE DEST
tac
Function: concatenate and print files in reverse
Usage: tac [OPTION]... [FILE]...
strings
Function: print the strings of printable characters in files.
Usage: strings [-afovV] [-min-len] [-n min-len] [--bytes=min-len] [-t radix] [--radix=radix] [-e encoding] [--encoding=encoding] [-] [--all] [--print-file-name] [-T bfdname] [--target=bfdname] [-w] [--include-all-whitespace] [-s] [--output-separatorsep_string] [--help] [--version] file...
atrm
Function: queue, examine or delete jobs for later execu-tion
Usage: atrm [-V] job [job...]
date
Function: print or set the system date and time
Usage: date [OPTION]... [+FORMAT]
sudo
Function: execute a command as another user
Usage: sudo -h | -K | -k | -V
test
Function: check file types and compare values
Usage: test EXPRESSION