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1227625a SP |
1 | .\" Copyright (c) 1985, 1991, 1993 |
2 | .\" The Regents of the University of California. All rights reserved. | |
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5 | .\" modification, are permitted provided that the following conditions | |
6 | .\" are met: | |
7 | .\" 1. Redistributions of source code must retain the above copyright | |
8 | .\" notice, this list of conditions and the following disclaimer. | |
9 | .\" 2. Redistributions in binary form must reproduce the above copyright | |
10 | .\" notice, this list of conditions and the following disclaimer in the | |
11 | .\" documentation and/or other materials provided with the distribution. | |
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13 | .\" must display the following acknowledgement: | |
14 | .\" This product includes software developed by the University of | |
15 | .\" California, Berkeley and its contributors. | |
16 | .\" 4. Neither the name of the University nor the names of its contributors | |
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31 | .\" | |
08db2b86 | 32 | .\" $Id: restore.8.in,v 1.8 2000/03/08 11:25:58 stelian Exp $ |
1227625a | 33 | .\" |
8d4197bb | 34 | .Dd __DATE__ |
1227625a | 35 | .Dt RESTORE 8 |
df9ae507 | 36 | .Os "restore __VERSION__" |
1227625a SP |
37 | .Sh NAME |
38 | .Nm restore | |
39 | .Nd "restore files or file systems from backups made with dump" | |
40 | .Sh SYNOPSIS | |
41 | .Nm restore | |
42 | .Fl C | |
dc7cb1e2 | 43 | .Op Fl ckMvy |
1227625a SP |
44 | .Op Fl b Ar blocksize |
45 | .Op Fl D Ar filesystem | |
46 | .Op Fl f Ar file | |
47 | .Op Fl s Ar fileno | |
48 | .Op Fl T Ar directory | |
49 | .Nm restore | |
50 | .Fl i | |
dc7cb1e2 | 51 | .Op Fl chkmMNuvy |
1227625a SP |
52 | .Op Fl b Ar blocksize |
53 | .Op Fl f Ar file | |
54 | .Op Fl s Ar fileno | |
55 | .Op Fl T Ar directory | |
56 | .Nm restore | |
57 | .Fl R | |
dc7cb1e2 | 58 | .Op Fl ckMNuvy |
1227625a SP |
59 | .Op Fl b Ar blocksize |
60 | .Op Fl f Ar file | |
61 | .Op Fl s Ar fileno | |
62 | .Op Fl T Ar directory | |
63 | .Nm restore | |
64 | .Fl r | |
dc7cb1e2 | 65 | .Op Fl ckMNuvy |
1227625a SP |
66 | .Op Fl b Ar blocksize |
67 | .Op Fl f Ar file | |
68 | .Op Fl s Ar fileno | |
69 | .Op Fl T Ar directory | |
70 | .Nm restore | |
71 | .Fl t | |
dc7cb1e2 | 72 | .Op Fl chkMNuvy |
1227625a SP |
73 | .Op Fl b Ar blocksize |
74 | .Op Fl f Ar file | |
75 | .Op Fl s Ar fileno | |
76 | .Op Fl T Ar directory | |
77 | .Op file ... | |
78 | .Nm restore | |
08db2b86 SP |
79 | .Fl t |
80 | .Op Fl chkMNuvy | |
81 | .Op Fl b Ar blocksize | |
82 | .Op Fl f Ar file | |
83 | .Op Fl s Ar fileno | |
84 | .Op Fl T Ar directory | |
85 | .Op Fl X Ar filelist | |
86 | .Nm restore | |
1227625a | 87 | .Fl x |
dc7cb1e2 | 88 | .Op Fl chkmMNuvy |
1227625a SP |
89 | .Op Fl b Ar blocksize |
90 | .Op Fl f Ar file | |
91 | .Op Fl s Ar fileno | |
92 | .Op Fl T Ar directory | |
93 | .Op file ... | |
08db2b86 SP |
94 | .Nm restore |
95 | .Fl x | |
96 | .Op Fl chkmMNuvy | |
97 | .Op Fl b Ar blocksize | |
98 | .Op Fl f Ar file | |
99 | .Op Fl s Ar fileno | |
100 | .Op Fl T Ar directory | |
101 | .Op Fl X Ar filelist | |
1227625a | 102 | .Pp |
8d4197bb | 103 | .in |
1227625a SP |
104 | (The |
105 | .Bx 4.3 | |
ddd2ef55 | 106 | option syntax is implemented for backward compatibility but |
1227625a SP |
107 | is not documented here.) |
108 | .Sh DESCRIPTION | |
109 | The | |
110 | .Nm restore | |
111 | command performs the inverse function of | |
112 | .Xr dump 8 . | |
113 | A full backup of a file system may be restored and | |
114 | subsequent incremental backups layered on top of it. | |
115 | Single files and | |
116 | directory subtrees may be restored from full or partial | |
117 | backups. | |
118 | .Nm Restore | |
119 | works across a network; | |
120 | to do this see the | |
121 | .Fl f | |
122 | flag described below. | |
123 | Other arguments to the command are file or directory | |
124 | names specifying the files that are to be restored. | |
125 | Unless the | |
126 | .Fl h | |
127 | flag is specified (see below), | |
128 | the appearance of a directory name refers to | |
129 | the files and (recursively) subdirectories of that directory. | |
130 | .Pp | |
131 | Exactly one of the following flags is required: | |
132 | .Bl -tag -width Ds | |
133 | .It Fl C | |
134 | This mode allows comparison of files from a dump. | |
135 | .Nm Restore | |
136 | reads the backup and compares its contents with files present on the | |
137 | disk. | |
138 | It first changes its working directory to the root of the filesystem | |
139 | that was dumped and compares the tape with the files in its new | |
140 | current directory. | |
141 | .It Fl i | |
142 | This mode allows interactive restoration of files from a dump. | |
143 | After reading in the directory information from the dump, | |
144 | .Nm restore | |
145 | provides a shell like interface that allows the user to move | |
146 | around the directory tree selecting files to be extracted. | |
147 | The available commands are given below; | |
148 | for those commands that require an argument, | |
149 | the default is the current directory. | |
150 | .Bl -tag -width Fl | |
151 | .It Ic add Op Ar arg | |
152 | The current directory or specified argument is added to the list of | |
153 | files to be extracted. | |
154 | If a directory is specified, then it and all its descendents are | |
155 | added to the extraction list | |
156 | (unless the | |
157 | .Fl h | |
158 | flag is specified on the command line). | |
ddd2ef55 SP |
159 | Files that are on the extraction list are prepended with a |
160 | .Dq \&* | |
1227625a SP |
161 | when they are listed by |
162 | .Ic ls . | |
163 | .It Ic \&cd Ar arg | |
164 | Change the current working directory to the specified argument. | |
165 | .It Ic delete Op Ar arg | |
166 | The current directory or specified argument is deleted from the list of | |
167 | files to be extracted. | |
168 | If a directory is specified, then it and all its descendents are | |
169 | deleted from the extraction list | |
170 | (unless the | |
171 | .Fl h | |
172 | flag is specified on the command line). | |
173 | The most expedient way to extract most of the files from a directory | |
174 | is to add the directory to the extraction list and then delete | |
175 | those files that are not needed. | |
176 | .It Ic extract | |
ddd2ef55 | 177 | All files on the extraction list are extracted |
1227625a SP |
178 | from the dump. |
179 | .Nm Restore | |
180 | will ask which volume the user wishes to mount. | |
181 | The fastest way to extract a few files is to | |
ddd2ef55 | 182 | start with the last volume and work towards the first volume. |
1227625a SP |
183 | .It Ic help |
184 | List a summary of the available commands. | |
185 | .It Ic \&ls Op Ar arg | |
186 | List the current or specified directory. | |
ddd2ef55 SP |
187 | Entries that are directories are appended with a |
188 | .Dq \&* . | |
1227625a SP |
189 | Entries that have been marked for extraction are prepended with a ``*''. |
190 | If the verbose | |
ddd2ef55 | 191 | flag is set, the inode number of each entry is also listed. |
1227625a SP |
192 | .It Ic pwd |
193 | Print the full pathname of the current working directory. | |
194 | .It Ic quit | |
195 | Restore immediately exits, | |
196 | even if the extraction list is not empty. | |
197 | .It Ic setmodes | |
ddd2ef55 | 198 | All directories that have been added to the extraction list |
1227625a SP |
199 | have their owner, modes, and times set; |
200 | nothing is extracted from the dump. | |
201 | This is useful for cleaning up after a restore has been prematurely aborted. | |
202 | .It Ic verbose | |
203 | The sense of the | |
204 | .Fl v | |
205 | flag is toggled. | |
206 | When set, the verbose flag causes the | |
207 | .Ic ls | |
208 | command to list the inode numbers of all entries. | |
209 | It also causes | |
210 | .Nm restore | |
211 | to print out information about each file as it is extracted. | |
212 | .El | |
213 | .It Fl R | |
214 | .Nm Restore | |
ddd2ef55 | 215 | requests a particular tape of a multi-volume set on which to restart |
1227625a SP |
216 | a full restore |
217 | (see the | |
218 | .Fl r | |
219 | flag below). | |
220 | This is useful if the restore has been interrupted. | |
221 | .It Fl r | |
ddd2ef55 | 222 | Restore (rebuild) a file system. |
1227625a | 223 | The target file system should be made pristine with |
8d4197bb | 224 | .Xr mke2fs 8 , |
ddd2ef55 | 225 | mounted, and the user |
1227625a SP |
226 | .Xr cd Ns 'd |
227 | into the pristine file system | |
228 | before starting the restoration of the initial level 0 backup. If the | |
229 | level 0 restores successfully, the | |
230 | .Fl r | |
231 | flag may be used to restore | |
232 | any necessary incremental backups on top of the level 0. | |
233 | The | |
234 | .Fl r | |
235 | flag precludes an interactive file extraction and can be | |
ddd2ef55 SP |
236 | detrimental to one's health (not to mention the disk) if not used carefully. |
237 | An example: | |
1227625a | 238 | .Bd -literal -offset indent |
8d4197bb SP |
239 | mke2fs /dev/sda1 |
240 | mount /dev/sda1 /mnt | |
1227625a SP |
241 | cd /mnt |
242 | ||
8d4197bb | 243 | restore rf /dev/st0 |
1227625a SP |
244 | .Ed |
245 | .Pp | |
246 | Note that | |
247 | .Nm restore | |
248 | leaves a file | |
249 | .Pa restoresymtable | |
250 | in the root directory to pass information between incremental | |
251 | restore passes. | |
252 | This file should be removed when the last incremental has been | |
253 | restored. | |
254 | .Pp | |
255 | .Nm Restore , | |
256 | in conjunction with | |
8d4197bb | 257 | .Xr mke2fs 8 |
1227625a SP |
258 | and |
259 | .Xr dump 8 , | |
260 | may be used to modify file system parameters | |
261 | such as size or block size. | |
262 | .It Fl t | |
263 | The names of the specified files are listed if they occur | |
264 | on the backup. | |
265 | If no file argument is given, | |
ddd2ef55 | 266 | the root directory is listed, |
1227625a SP |
267 | which results in the entire content of the |
268 | backup being listed, | |
269 | unless the | |
270 | .Fl h | |
271 | flag has been specified. | |
272 | Note that the | |
273 | .Fl t | |
274 | flag replaces the function of the old | |
275 | .Xr dumpdir 8 | |
276 | program. | |
08db2b86 SP |
277 | See also the |
278 | .Fl X | |
279 | option below. | |
1227625a SP |
280 | .ne 1i |
281 | .It Fl x | |
282 | The named files are read from the given media. | |
283 | If a named file matches a directory whose contents | |
284 | are on the backup | |
285 | and the | |
286 | .Fl h | |
287 | flag is not specified, | |
288 | the directory is recursively extracted. | |
289 | The owner, modification time, | |
290 | and mode are restored (if possible). | |
291 | If no file argument is given, | |
ddd2ef55 | 292 | the root directory is extracted, |
1227625a SP |
293 | which results in the entire content of the |
294 | backup being extracted, | |
295 | unless the | |
296 | .Fl h | |
297 | flag has been specified. | |
08db2b86 SP |
298 | See also the |
299 | .Fl X | |
300 | option below. | |
1227625a SP |
301 | .El |
302 | .Pp | |
303 | The following additional options may be specified: | |
304 | .Bl -tag -width Ds | |
305 | .It Fl b Ar blocksize | |
306 | The number of kilobytes per dump record. | |
307 | If the | |
308 | .Fl b | |
309 | option is not specified, | |
310 | .Nm restore | |
b45f51d6 | 311 | tries to determine the media block size dynamically. |
1227625a SP |
312 | .It Fl c |
313 | Normally, | |
314 | .Nm restore | |
315 | will try to determine dynamically whether the dump was made from an | |
b45f51d6 | 316 | old (pre-4.4) or new format file system. The |
1227625a SP |
317 | .Fl c |
318 | flag disables this check, and only allows reading a dump in the old | |
319 | format. | |
320 | .It Fl D Ar filesystem | |
321 | The | |
322 | .Fl D | |
323 | flag allows the user to specify the filesystem name when using | |
324 | .Nm restore | |
325 | with the | |
326 | .Fl C | |
327 | option to check the backup. | |
328 | .It Fl f Ar file | |
329 | Read the backup from | |
330 | .Ar file ; | |
331 | .Ar file | |
332 | may be a special device file | |
333 | like | |
ddd2ef55 | 334 | .Pa /dev/st0 |
1227625a | 335 | (a tape drive), |
8d4197bb | 336 | .Pa /dev/sda1 |
1227625a SP |
337 | (a disk drive), |
338 | an ordinary file, | |
339 | or | |
340 | .Ql Fl | |
341 | (the standard input). | |
342 | If the name of the file is of the form | |
ddd2ef55 | 343 | .Dq host:file |
1227625a SP |
344 | or |
345 | .Dq user@host:file , | |
346 | .Nm restore | |
347 | reads from the named file on the remote host using | |
348 | .Xr rmt 8 . | |
349 | .Pp | |
b45f51d6 SP |
350 | .It Fl k |
351 | Use Kerberos authentication when contacting the remote tape server. | |
352 | (Only available if this options was enabled when | |
353 | .Nm restore | |
354 | was compiled.) | |
355 | .Pp | |
1227625a SP |
356 | .It Fl h |
357 | Extract the actual directory, | |
358 | rather than the files that it references. | |
359 | This prevents hierarchical restoration of complete subtrees | |
360 | from the dump. | |
361 | .It Fl m | |
362 | Extract by inode numbers rather than by file name. | |
363 | This is useful if only a few files are being extracted, | |
364 | and one wants to avoid regenerating the complete pathname | |
365 | to the file. | |
dc7cb1e2 SP |
366 | .It Fl M |
367 | Enables the multi-volume feature (for reading dumps made using | |
368 | the | |
369 | .Fl M | |
370 | option of dump). The name specified with | |
371 | .Fl f | |
372 | is treated as a prefix and | |
373 | .Nm | |
374 | tries to read in sequence from <prefix>001, <prefix>002 etc. | |
1227625a SP |
375 | .It Fl N |
376 | The | |
377 | .Fl N | |
378 | flag causes | |
dc7cb1e2 SP |
379 | .Nm |
380 | to only print file names. Files are not extracted. | |
1227625a SP |
381 | .It Fl s Ar fileno |
382 | Read from the specified | |
383 | .Ar fileno | |
384 | on a multi-file tape. | |
385 | File numbering starts at 1. | |
386 | .It Fl T Ar directory | |
387 | The | |
388 | .Fl T | |
389 | flag allows the user to specify a directory to use for the storage of | |
390 | temporary files. The default value is /tmp. This flag is most useful | |
391 | when restoring files after having booted from a floppy. There might be little | |
392 | or no space on the floppy filesystem, but another source of space might exist. | |
b45f51d6 SP |
393 | .It Fl u |
394 | When creating certain types of files, restore may generate a warning | |
395 | diagnostic if they already exist in the target directory. | |
396 | To prevent this, the | |
397 | .Fl u | |
398 | (unlink) flag causes restore to remove old entries before attempting | |
399 | to create new ones. | |
1227625a SP |
400 | .It Fl v |
401 | Normally | |
402 | .Nm restore | |
403 | does its work silently. | |
404 | The | |
405 | .Fl v | |
406 | (verbose) | |
407 | flag causes it to type the name of each file it treats | |
408 | preceded by its file type. | |
08db2b86 SP |
409 | .It Fl X Ar filelist |
410 | Get the list of the files to be listed or extracted from the text file | |
411 | .Ar filelist | |
412 | instead of reading them on the command line. This can be used in | |
413 | conjunction with the | |
414 | .Fl t | |
415 | or | |
416 | .Fl x | |
417 | commands. The file | |
418 | .Ar filelist | |
419 | should contain file names separated by newlines. | |
1227625a SP |
420 | .It Fl y |
421 | Do not ask the user whether to abort the restore in the event of an error. | |
422 | Always try to skip over the bad block(s) and continue. | |
423 | .El | |
424 | .Sh DIAGNOSTICS | |
ddd2ef55 | 425 | Complains if it gets a read error. |
1227625a SP |
426 | If |
427 | .Fl y | |
428 | has been specified, or the user responds | |
429 | .Ql y , | |
430 | .Nm restore | |
431 | will attempt to continue the restore. | |
432 | .Pp | |
433 | If a backup was made using more than one tape volume, | |
434 | .Nm restore | |
435 | will notify the user when it is time to mount the next volume. | |
436 | If the | |
437 | .Fl x | |
438 | or | |
439 | .Fl i | |
440 | flag has been specified, | |
441 | .Nm restore | |
442 | will also ask which volume the user wishes to mount. | |
443 | The fastest way to extract a few files is to | |
444 | start with the last volume, and work towards the first volume. | |
445 | .Pp | |
446 | There are numerous consistency checks that can be listed by | |
447 | .Nm restore . | |
ddd2ef55 SP |
448 | Most checks are self-explanatory or can |
449 | .Dq never happen . | |
1227625a SP |
450 | Common errors are given below. |
451 | .Pp | |
452 | .Bl -tag -width Ds -compact | |
ddd2ef55 | 453 | .It Converting to new file system format |
1227625a SP |
454 | A dump tape created from the old file system has been loaded. |
455 | It is automatically converted to the new file system format. | |
456 | .Pp | |
457 | .It <filename>: not found on tape | |
458 | The specified file name was listed in the tape directory, | |
459 | but was not found on the tape. | |
460 | This is caused by tape read errors while looking for the file, | |
461 | and from using a dump tape created on an active file system. | |
462 | .Pp | |
463 | .It expected next file <inumber>, got <inumber> | |
464 | A file that was not listed in the directory showed up. | |
465 | This can occur when using a dump created on an active file system. | |
466 | .Pp | |
467 | .It Incremental dump too low | |
ddd2ef55 | 468 | When doing an incremental restore, |
1227625a SP |
469 | a dump that was written before the previous incremental dump, |
470 | or that has too low an incremental level has been loaded. | |
471 | .Pp | |
472 | .It Incremental dump too high | |
ddd2ef55 | 473 | When doing an incremental restore, |
1227625a SP |
474 | a dump that does not begin its coverage where the previous incremental |
475 | dump left off, | |
476 | or that has too high an incremental level has been loaded. | |
477 | .Pp | |
478 | .It Tape read error while restoring <filename> | |
479 | .It Tape read error while skipping over inode <inumber> | |
480 | .It Tape read error while trying to resynchronize | |
481 | A tape (or other media) read error has occurred. | |
482 | If a file name is specified, | |
ddd2ef55 | 483 | its contents are probably partially wrong. |
1227625a | 484 | If an inode is being skipped or the tape is trying to resynchronize, |
ddd2ef55 | 485 | no extracted files have been corrupted, |
1227625a SP |
486 | though files may not be found on the tape. |
487 | .Pp | |
488 | .It resync restore, skipped <num> blocks | |
489 | After a dump read error, | |
490 | .Nm restore | |
491 | may have to resynchronize itself. | |
492 | This message lists the number of blocks that were skipped over. | |
493 | .El | |
b45f51d6 | 494 | .Sh ENVIRONMENT |
ddd2ef55 SP |
495 | If the following environment variable exists it will be utilized by |
496 | .Nm restore : | |
497 | .Pp | |
498 | .Bl -tag -width "TMPDIR" -compact | |
b45f51d6 SP |
499 | .It Ev TAPE |
500 | If no -f option was specified, | |
501 | .Nm | |
502 | will use the device specified via | |
503 | .Ev TAPE | |
504 | as the dump device. | |
505 | .Ev TAPE | |
506 | may be of the form | |
507 | .Qq tapename , | |
ddd2ef55 | 508 | .Qq host:tapename |
b45f51d6 SP |
509 | or |
510 | .Qq user@host:tapename . | |
ddd2ef55 SP |
511 | .It Ev TMPDIR |
512 | The directory given in | |
513 | .Ev TMPDIR | |
514 | will be used | |
515 | instead of | |
516 | .Pa /tmp | |
517 | to store temporary files. | |
b45f51d6 SP |
518 | .It Ev RMT |
519 | The environment variable | |
520 | .Ev RMT | |
521 | will be used to determine the pathname of the remote | |
522 | .Xr rmt 8 | |
523 | program. | |
0c62667d SP |
524 | .It Ev RSH |
525 | .Nm Restore | |
526 | uses the contents of this variable to determine the name of the | |
527 | remote shell command to use when doing a network restore (rsh, ssh etc.). | |
528 | If this variable is not set, | |
529 | .Xr rcmd 3 | |
530 | will be used, but only root will be able to do a network restore. | |
1227625a SP |
531 | .Sh FILES |
532 | .Bl -tag -width "./restoresymtable" -compact | |
ddd2ef55 | 533 | .It Pa /dev/st0 |
1227625a SP |
534 | the default tape drive |
535 | .It Pa /tmp/rstdir* | |
ddd2ef55 | 536 | file containing directories on the tape |
1227625a | 537 | .It Pa /tmp/rstmode* |
ddd2ef55 | 538 | owner, mode, and time stamps for directories |
1227625a | 539 | .It Pa \&./restoresymtable |
ddd2ef55 | 540 | information passed between incremental restores |
1227625a SP |
541 | .El |
542 | .Sh SEE ALSO | |
543 | .Xr dump 8 , | |
1227625a | 544 | .Xr mount 8 , |
8d4197bb | 545 | .Xr mke2fs 8 , |
1227625a SP |
546 | .Xr rmt 8 |
547 | .Sh BUGS | |
548 | .Nm Restore | |
549 | can get confused when doing incremental restores from | |
550 | dumps that were made on active file systems. | |
551 | .Pp | |
ddd2ef55 SP |
552 | A level 0 dump must be done after a full restore. |
553 | Because | |
554 | .Nm restore | |
555 | runs in user code, | |
1227625a SP |
556 | it has no control over inode allocation; |
557 | thus a full dump must be done to get a new set of directories | |
558 | reflecting the new inode numbering, | |
ddd2ef55 SP |
559 | even though the content of the files is unchanged. |
560 | .Pp | |
561 | The temporary files | |
562 | .Pa /tmp/rstdir* | |
563 | and | |
564 | .Pa /tmp/rstmode* | |
565 | are generated with a unique name based on the date of the dump | |
566 | and the process ID (see | |
567 | .Xr mktemp 3 ), | |
568 | except when | |
569 | .Fl r | |
570 | or | |
571 | .Fl R | |
572 | is used. | |
573 | Because | |
574 | .Fl R | |
575 | allows you to restart a | |
576 | .Fl r | |
577 | operation that may have been interrupted, the temporary files should | |
578 | be the same across different processes. | |
579 | In all other cases, the files are unique because it is possible to | |
580 | have two different dumps started at the same time, and separate | |
581 | operations shouldn't conflict with each other. | |
b45f51d6 | 582 | .Pp |
0c62667d SP |
583 | To do a network restore, you have to run restore as root or use |
584 | a remote shell replacement (see RSH variable). This is due | |
b45f51d6 SP |
585 | to the previous security history of dump and restore. (restore is |
586 | written to be setuid root, but we are not certain all bugs are gone | |
587 | from the restore code - run setuid at your own risk.) | |
8d4197bb SP |
588 | .Sh AUTHOR |
589 | The | |
590 | .Nm dump/restore | |
591 | backup suit was ported to Linux's Second Extended File System | |
592 | by Remy Card <card@Linux.EU.Org>. He maintained the initial versions | |
593 | of dump (up and including 0.4b4, released in january 1997). | |
594 | .Pp | |
595 | Starting with 0.4b5, the new maintainer is Stelian Pop | |
596 | .br | |
597 | <pop@cybercable.fr>. | |
598 | .Sh AVAILABILITY | |
599 | The | |
600 | .Nm dump/restore | |
01fb6bd5 SP |
601 | backup suit is available from |
602 | .br | |
603 | http://dump.sourceforge.net | |
1227625a SP |
604 | .Sh HISTORY |
605 | The | |
606 | .Nm restore | |
607 | command appeared in | |
608 | .Bx 4.2 . |