| tail.1 - 9base - revived minimalist port of Plan 9 userland to Unix | |
| git clone git://git.suckless.org/9base | |
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| README | |
| LICENSE | |
| --- | |
| tail.1 (1412B) | |
| --- | |
| 1 .TH TAIL 1 | |
| 2 .SH NAME | |
| 3 tail \- deliver the last part of a file | |
| 4 .SH SYNOPSIS | |
| 5 .B tail | |
| 6 [ | |
| 7 .BR +- \fInumber\fP[ lbc ][ rf ] | |
| 8 ] | |
| 9 [ | |
| 10 .I file | |
| 11 ] | |
| 12 .PP | |
| 13 .B tail | |
| 14 [ | |
| 15 .B -fr | |
| 16 ] | |
| 17 [ | |
| 18 .B -n | |
| 19 .I nlines | |
| 20 ] | |
| 21 [ | |
| 22 .B -c | |
| 23 .I nbytes | |
| 24 ] | |
| 25 [ | |
| 26 .I file | |
| 27 ] | |
| 28 .SH DESCRIPTION | |
| 29 .I Tail | |
| 30 copies the named file to the standard output beginning | |
| 31 at a designated place. | |
| 32 If no file is named, the standard input is copied. | |
| 33 .PP | |
| 34 Copying begins at position | |
| 35 .BI + number | |
| 36 measured from the beginning, or | |
| 37 .BI - number | |
| 38 from the end of the input. | |
| 39 .I Number | |
| 40 is counted in lines, 1K blocks or bytes, | |
| 41 according to the appended flag | |
| 42 .LR l , | |
| 43 .LR b , | |
| 44 or | |
| 45 .LR c . | |
| 46 Default is | |
| 47 .B -10l | |
| 48 (ten ell). | |
| 49 .PP | |
| 50 The further flag | |
| 51 .L r | |
| 52 causes tail to print lines from the end of the file in reverse order; | |
| 53 .L f | |
| 54 (follow) causes | |
| 55 .IR tail , | |
| 56 after printing to the end, to keep watch and | |
| 57 print further data as it appears. | |
| 58 .PP | |
| 59 The second syntax is that promulgated by POSIX, where | |
| 60 the | |
| 61 .I numbers | |
| 62 rather than the options are signed. | |
| 63 .SH EXAMPLES | |
| 64 .TP | |
| 65 .B tail file | |
| 66 Print the last 10 lines of a file. | |
| 67 .TP | |
| 68 .B tail +0f file | |
| 69 Print a file, and continue to watch | |
| 70 data accumulate as it grows. | |
| 71 .TP | |
| 72 .B sed 10q file | |
| 73 Print the first 10 lines of a file. | |
| 74 .SH SOURCE | |
| 75 .B \*9/src/cmd/tail.c | |
| 76 .SH BUGS | |
| 77 Tails relative to the end of the file | |
| 78 are treasured up in a buffer, and thus | |
| 79 are limited in length. | |
| 80 .PP | |
| 81 According to custom, option | |
| 82 .BI + number | |
| 83 counts lines from 1, and counts | |
| 84 blocks and bytes from 0. | |
| 85 .PP | |
| 86 .I Tail | |
| 87 is ignorant of UTF. |