sha1sum - compute and check SHA1 message digest


   sha1sum [OPTION]... [FILE]...


   Print or check SHA1 (160-bit) checksums.

   With no FILE, or when FILE is -, read standard input.

   -b, --binary
          read in binary mode

   -c, --check
          read SHA1 sums from the FILEs and check them

   --tag  create a BSD-style checksum

   -t, --text
          read in text mode (default)

   The following five options are useful only when verifying checksums:
          don't fail or report status for missing files

          don't print OK for each successfully verified file

          don't output anything, status code shows success

          exit non-zero for improperly formatted checksum lines

   -w, --warn
          warn about improperly formatted checksum lines

   --help display this help and exit

          output version information and exit

   The  sums  are computed as described in FIPS-180-1.  When checking, the
   input should be a former output of this program.  The default  mode  is
   to  print  a  line with checksum, a space, a character indicating input
   mode ('*' for binary, ' ' for text or where binary  is  insignificant),
   and name for each FILE.


   Written by Ulrich Drepper, Scott Miller, and David Madore.


   GNU coreutils online help: <>
   Report           sha1sum          translation          bugs          to


   Copyright  2016 Free Software Foundation, Inc.   License  GPLv3+:  GNU
   GPL version 3 or later <>.
   This  is  free  software:  you  are free to change and redistribute it.
   There is NO WARRANTY, to the extent permitted by law.


   Full documentation at: <>
   or available locally via: info '(coreutils) sha1sum invocation'

More Linux Commands

Tk_AllocCursorFromObj(3) - maintain database of cursors.....
These procedures manage a collection of cursors being used by an application. The procedures allow cursors to be re-used efficiently, thereby avoiding server ov

XTimeCoord(3) - send events and pointer motion history struc
The XSendEvent function identifies the destination window, determines which clients should receive the specified events, and ignores any active grabs. This func

pam_securetty(8) - Limit root login to special devices......
pam_securetty is a PAM module that allows root logins only if the user is logging in on a secure tty, as defined by the listing in /etc/securetty. pam_securetty

DisplayWidth(3) - image format functions and macros.........
The XListPixmapFormats function returns an array of XPixmapFormatValues structures that describe the types of Z format images supported by the specified display

XTestSetVisualIDOfVisual(3) - XTest extension functions.....
This extension is a minimal set of client and server extensions required to completely test the X11 server with no user intervention. This extension is not inte

raise(n) - Change a window's position in the stacking order
If the aboveThis argument is omitted then the command raises window so that it is above all of its siblings in the stacking order (it will not be obscured by an

systemctl(1) - Control the systemd system and service manage
systemctl may be used to introspect and control the state of the systemd(1) system and service manager. OPTIONS The following options are understood: -t, --type

TIFFsize(3tiff) - return the size of various items associate
TIFFScanlineSize returns the size in bytes of a row of data as it would be returned in a call to TIFFReadScanline, or as it would be expected in a call to TIFFW

chroot(2) - change root directory - Linux manual page.......
chroot() changes the root directory of the calling process to that specified in path. This directory will be used for pathnames beginning with /. The root direc

FcFreeTypeCharSetAndSpacing(3) - compute unicode coverage an
FcFreeTypeCharSetAndSpacing.3 - Scans a FreeType face and returns the set of encoded Unicode chars. This scans several encoding tables to build as complete a li

clnt_sperror(3) - library routines for remote procedure call
These routines allow C programs to make procedure calls on other machines across the network. First, the client calls a procedure to send a data packet to the s

Mail::SPF::Mech::All(3pm) - SPF record "all" mechanism class
An object of class Mail::SPF::Mech::All represents an SPF record mechanism of type all. Constructors The following constructors are provided: new: returns Mail:

We can't live, work or learn in freedom unless the software we use is free.