debugfs.8: fix name of argument to blocks command

[tools/e2fsprogs.git] / debugfs / debugfs.8.in

diff --git a/debugfs/debugfs.8.in b/debugfs/debugfs.8.in
index aa9070d..87d487e 100644 (file)
--- a/debugfs/debugfs.8.in
+++ b/debugfs/debugfs.8.in
@@ -42,10 +42,9 @@ The
 .B debugfs
 program is an interactive file system debugger. It can be used to
 examine and change the state of an ext2, ext3, or ext4 file system.
-.br
+.PP
 .I device
-is the special file corresponding to the device containing the
-file system (e.g /dev/hdXX).
+is a block device (e.g., /dev/sdXX) or a file containing the file system.
 .SH OPTIONS
 .TP
 .I \-w
@@ -95,8 +94,10 @@ should be used when reading blocks not found in the ext2 image file.
 This includes data, directory, and indirect blocks.
 .TP
 .I -b blocksize
-Forces the use of the given block size for the file system, rather than
-detecting the correct block size as normal.
+Forces the use of the given block size (in bytes) for the file system,
+rather than detecting the correct block size automatically.  (This
+option is rarely needed; it is used primarily when the file system is
+extremely badly damaged/corrupted.)
 .TP
 .I -s superblock
 Causes the file system superblock to be read from the given block
@@ -105,7 +106,9 @@ number, instead of using the primary superblock (located at an offset of
 .I -s
 option, you must also provide the blocksize of the filesystem via the
 .I -b
-option.
+option.   (This
+option is rarely needed; it is used primarily when the file system is
+extremely badly damaged/corrupted.)
 .TP
 .I -f cmd_file
 Causes
@@ -176,7 +179,7 @@ This is a list of the commands which
 .B debugfs
 supports.
 .TP
-.BI blocks " filespace"
+.BI blocks " filespec"
 Print the blocks used by the inode
 .I filespec
 to stdout.
@@ -222,6 +225,12 @@ master superblock.
 Clear the contents of the inode
 .IR filespec .
 .TP
+.BI copy_inode " source_inode destination_inode"
+Copy the conents of the inode structure in
+.I source_inode
+and use it to overwrite the inode structure at
+.IR destination_inode .
+.TP
 .BI dirsearch " filespec filename"
 Search the directory
 .I filespec
@@ -243,8 +252,13 @@ option is given set the owner, group and permissions information on
 to match
 .IR filespec .
 .TP
-.B dump_mmp
-Display the multiple-mount protection (mmp) field values.
+.BI dump_mmp " [mmp_block]"
+Display the multiple-mount protection (mmp) field values.  If
+.I mmp_block
+is specified then verify and dump the MMP values from the given block
+number, otherwise use the
+.B s_mmp_block
+field in the superblock to locate and use the existing MMP block.
 .TP
 .BI dx_hash " [-h hash_alg] [-s hash_seed] filename"
 Calculate the directory hash of
@@ -392,11 +406,6 @@ is specified, also clear num-1 inodes after the specified inode.
 Print a list of commands understood by
 .BR debugfs .
 .TP
-.BI hexdump_block " block"
-Dump the contents of
-.I block
-in hex and ASCII.
-.TP
 .BI htree_dump " filespec"
 Dump the hash-indexed directory
 .IR filespec ,