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DESCRIPTION
passwd changes the specified user's password. Only the superuser is allowed to change other users' passwords. If the user is not root, then the old password is prompted for and verified.
A new password is prompted for twice, to avoid typing mistakes. Unless the user is the superuser, the new password must have more than six characters, and must have either both uppercase and lowercase letters, or nonletters. Some passwords that are similar to the user's name are not allowed.
FILES
/etc/passwd /etc/shells
SEE ALSO
chsh(1), chfn(1)
BUGS
A password consisting of all digits is allowed.
No warnings are printed if the superuser chooses a poor password.
The _f and _s options are not supported.
AUTHOR
Peter Orbaek (poe@daimi.aau.dk)
Linux 1.0, 22 June 1994
paste—Merge lines of files
SYNOPSIS
paste [_s] [_d delim-list] [--serial] [--delimiters=delim-list] [--help] [--version] [file...]
DESCRIPTION
This manual page documents the GNU version of paste. paste prints lines consisting of sequentially corresponding lines of each given file, separated by tabs, terminated by a newline. If no files are given, the standard input is used. A filename of - means standard input.
OPTIONS
| _s, --serial | Paste the lines of one file at a time rather than one line from each file. |
| _d, --delimiters delim-list | Consecutively use the characters in delim-list instead of TAB to separate merged lines. When delim-list is exhausted, start again at its beginning. |
| --help | Print a usage message and exit with a nonzero status. |
| --version | Print version information on standard output, then exit. |
GNU Text Utilities
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pbmclean—Flip isolated pixels in portable bitmap
SYNOPSIS
pbmclean [-connect] [pbmfile]
DESCRIPTION
pbmclean reads a portable bitmap as input and outputs a portable bitmap with every pixel that has less than connect identical neighbors inverted. pbmclean can be used to clean up "snow" on bitmap images.
SEE ALSO
pbm(5)
AUTHOR
Copyright " 1990 by Angus Duggan. Copyright " 1989 by Jef Poskanzer.
Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation. This software is provided "as is" without express or implied warranty.
pbmfilters—List of all programs in the PBMPlus package
DESCRIPTION
| anytopnm | Attempt to convert an unknown type of image file to a portable anymap |
| asciitopgm | Convert ASCII graphics into a portable graymap |
| atktopbm | Convert Andrew Toolkit raster object to a portable bitmap |
| bioradtopgm | Convert a Biorad confocal file into a portable graymap |
| bmptoppm | Convert a BMP file into a portable pixmap |
| brushtopbm | Convert a doodle brush file into a portable bitmap |
| cmuwmtopbm | Convert a CMU window manager bitmap into a portable bitmap |
| fitstopnm | Convert a FITS file into a portable anymap |
| fstopgm | Convert a Usenix FaceSaver file into a portable graymap |
| g3topbm | Convert a Group 3 fax file into a portable bitmap |
| gemtopbm | Convert a GEM IMG file into a portable bitmap |
| giftopnm | Convert a GIF file into a portable anymap |
| gouldtoppm | Convert Gould scanner file into a portable pixmap |
| hipstopgm | Convert a HIPS file into a portable graymap |
| hpcdtoppm | Convert a Photo-CD file into a portable pixmap |
| icontopbm | Convert a Sun icon into a portable bitmap |
| ilbmtoppm | Convert an ILBM file into a portable pixmap |
| imgtoppm | Convert an IMG-whatnot file into a portable pixmap |
| lispmtopgm | Convert a Lisp machine bitmap file into PGM format |
| macptopbm | Convert a MacPaint file into a portable bitmap |
| mgrtopbm | Convert an MGR bitmap into a portable bitmap |
| mtvtoppm | Convert output from the MTV or PRT ray tracers into a portable pixmap |
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| pbmclean | Flip isolated pixels in portable bitmap |
| pbmlife | Apply Conway's Rules of Life to a portable bitmap |
| pbmmake | Create a blank bitmap of a specified size |
| pbmmask | Create a mask bitmap from a regular bitmap |
| pbmpscale | Enlarge a portable bitmap with edge smoothing |
| pbmreduce | Read a portable bitmap and reduce it N t imes |
| pbmtext | Render text into a bitmap |
| pbmto10x | Convert a portable bitmap into Gemini 10X printer graphics |
| pbmto4425 | Display PBM images on an AT&T 4425 terminal |
| pbmtoascii | Convert a portable bitmap into ASCII graphics |
| pbmtoatk | Convert a portable bitmap to Andrew Toolkit raster object |
| pbmtobg | Convert a portable bitmap into BitGraph graphics |
| pbmtocmuwm | Convert a portable bitmap into a CMU window manager bitmap |
| pbmtoepsi | Convert a portable bitmap into an encapsulated PostScript |
| pbmtoepson | Convert a portable bitmap into Epson printer graphics |
| pbmtog3 | Convert a portable bitmap into a Group 3 fax file |
| pbmtogem | Convert a portable bitmap into a GEM IMG file |
| pbmtogo | Convert a portable bitmap into compressed GraphOn graphics |
| pbmtoicon | Convert a portable bitmap into a Sun icon |
| pbmtolj | Convert a portable bitmap into HP LaserJet format |
| pbmtoln03 | Convert portable bitmap to DEC LN03+ Sixel output |
| pbmtolps | Convert portable bitmap to PostScript |
| pbmtomacp | Convert a portable bitmap into a MacPaint file |
| pbmtomgr | Convert a portable bitmap into an MGR bitmap |
| pbmtopgm | Convert a portable bitmap to portable graymap by averaging areas |
| pbmtopi3 | Convert a portable bitmap into an Atari Degas .pi3 file |
| pbmtopk | Convert a portable bitmap into a packed (PK) format font |
| pbmtoplot | Convert a portable bitmap into a UNIX plot(5) file |
| pbmtoptx | Convert a portable bitmap into Printronix printer graphics |
| pbmtox10bm | Convert a portable bitmap into an X10 bitmap |
| pbmtoxbm | Convert a portable bitmap into an X11 bitmap |
| pbmtozinc | Convert a portable bitmap into a Zinc bitmap |
| pbmupc | Create a Universal Product Code bitmap |
| pcxtoppm | Convert a PCX file into a portable pixmap |
| pgmbentley | Bentleyize a portable graymap |
| pgmcrater | Create cratered terrain by fractal forgery |
| pgmedge | Edge-detect a portable graymap |
| pgmenhance | Edge-enhance a portable graymap |
| pgmhist | Print a histogram of the values in a portable graymap |
| pgmkernel | Generate a convolution kernel |
| pgmnoise | Create a graymap made up of white noise |
| pgmnorm | Normalize the contrast in a portable graymap |
| pgmoil | Turn a portable graymap into an oil painting |
| pgmramp | Generate a grayscale ramp |
| pgmtexture | Calculate textural features on a portable graymap |
| pgmtofs | Convert a portable graymap to Usenix FaceSaver format |