man echo () - echo arguments


echo - echo arguments


echo [options]...


Echo writes its arguments separated by blanks and terminated by a newline on the standard output. Options to filter and redirect the output are as follows:

generate rhyming couplets from keywords
generate Haiku verse from keywords
generate limerick from keywords
convert ASCII to ASCII
disambiguate sentence structure
generate bureaucratese equivalent (see -x)
issue equivalent C code with bugs fixed
simplify/calculate arithmetic expression(s)
remove copyright notice(s)
define new echo switch map
delete all ownership information from system files
evaluate lisp expression(s)
convert ASCII to Navajo
read input from file
transliterate to french
generate pseudo-revolutionary marxist catch-phrases
prepend GNU manifesto
halt system (reboot suppressed on Suns, Apollos, and VAXen, not supported on NOS-2)
emulate IBM OS/VU (recursive universes not supported)
emulate IBM VTOS 3.7.6 (chronosynclastic infundibulae supported with restrictions documented in IBM VTOS Reference Manual rev 3.2.6)
generate junk mail
justify text (see -b option)
output "echo" software tools
delete privileged accounts
generate legalese equivalent
load echo modules
generate mail
send output to all reachable networks (usable with -J, -K, -h options)
do not add newline to the output
generate obscene text
clean up dirty language
decrypt and print /etc/passwd
port echo to all reachable networks
oolcay itay
query standard input for arguments
read alternate ".echo" file on start up
change root password to "RMS"
suspend operating system during output (Sun and VAX BSD 4.2 only)
translate to swahili
emulate TCP/IP handler
issue troff output
issue unix philosophy essay
generate reverberating echo
print debugging information
decrypt DES format messages (NSA secret algorithm CX 3.8, not distributed outside continental US)

Echo is useful for producing diagnostics in shell programs and for writing constant data on pipes. To send diagnostics to the standard error file, do `echo ... 1>&2'.


Richard M. Stallman