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authorFernando ApesteguĂ­a <fernape@FreeBSD.org>2020-10-20 13:05:25 +0000
committerFernando ApesteguĂ­a <fernape@FreeBSD.org>2020-10-20 13:05:25 +0000
commitea772485d1da1efa92e8f4a15f7c8941afe7adb2 (patch)
tree65ca49f28d8baa6b756f7a3d782b11b9e79a0cdd /usr.bin
parente9fb2bd9b8328e461d7f9b140e9beeb3d0d5730c (diff)
Notes
Diffstat (limited to 'usr.bin')
-rw-r--r--usr.bin/compress/compress.136
1 files changed, 35 insertions, 1 deletions
diff --git a/usr.bin/compress/compress.1 b/usr.bin/compress/compress.1
index 8569891f5cc9c..de44653775eae 100644
--- a/usr.bin/compress/compress.1
+++ b/usr.bin/compress/compress.1
@@ -32,7 +32,7 @@
.\" @(#)compress.1 8.2 (Berkeley) 4/18/94
.\" $FreeBSD$
.\"
-.Dd May 17, 2002
+.Dd October 20, 2020
.Dt COMPRESS 1
.Os
.Sh NAME
@@ -186,6 +186,40 @@ utility exits 2 if attempting to compress a file would not reduce its size
and the
.Fl f
option was not specified and if no other error occurs.
+.Sh EXAMPLES
+Create a file
+.Pa test_file
+with a single line of text:
+.Bd -literal -offset indent
+echo "This is a test" > test_file
+.Ed
+.Pp
+Try to reduce the size of the file using a 10-bit code and show the exit status:
+.Bd -literal -offset indent
+$ compress -b 10 test_file
+$ echo $?
+2
+.Ed
+.Pp
+Try to compress the file and show compression percentage:
+.Bd -literal -offset indent
+$ compress -v test_file
+test_file: file would grow; left unmodified
+.Ed
+.Pp
+Same as above but forcing compression:
+.Bd -literal -offset indent
+$ compress -f -v test_file
+test_file.Z: 79% expansion
+.Ed
+.Pp
+Compress and uncompress the string
+.Ql hello
+on the fly:
+.Bd -literal -offset indent
+$ echo "hello" | compress | uncompress
+hello
+.Ed
.Sh SEE ALSO
.Xr gunzip 1 ,
.Xr gzexe 1 ,