Hi guys,
I am new to AWK and unix scripting. Please see below my problem and let me know if anyone you can help.
I have 2 input files (example given below)
Input file 2 is a standard file (it will not change) and we have to get the name (second column after comma) from it and append it... (5 Replies)
I'm having problems since few days ago, and i'm not able to make it works with a simple awk+grep script (or other way to do this).
For example, i have a input file1.txt:
cat inputfile1.txt
218299910417
1172051195
1172070231
1172073514
1183135117
1183135118
1183135119
1281440202
... (3 Replies)
Hi,
I am trying to print a specific line in a file through sed or awk. The line number will be passed as a parameter from the previous step. My code looks as below.
TEMP3=`sed -n '$TEMP2p' $FILEPATH/Log.txt`
$TEMP2, I am getting from the previous step which is a numerical value(eg:3).
... (2 Replies)
Hi All,
I would like to print the content from the specific line of a file .
For example... i have file abc.txt which has 100 lines of code ,from this file i would like to print the content from 20,19,18th line......like that
Regards
Srikanth (4 Replies)
Hi,
I have a sample file as shown below, I am looking for sed or any command which prints the complete word only from the input file.
Ex:
$ cat "sample.log"
I am searching for a word which is present in this file
We can do a pattern search using grep but I need to cut only the word which... (1 Reply)
I have a file with class c IP addresses that I need to match to a column and print the matching lines of another file.
I started playing with grep -if file01.out file02.out but I am stuck as to how to match it to a column and print the matching lines;
cat file01.out
10.150.140... (5 Replies)
In the file below I am trying to extract a specific instance of path, if the adjacent plugin": "/rundb/api/v1/plugin/49/. Thank you :).
file
"path": "/results/analysis/output/Home/Auto_user_S5-00580-4-Medexome_65_028/plugin_out/FileExporter_out.52", "plugin": "/rundb/api/v1/plugin/49/",... (8 Replies)
In the perl one-liner below I am identifying the runs of 6a or 6A in each line starting with >. The code seems close but it prints each > line no matter if it has 6a or 6A in it. Only the line with the 6a or 6A needs to be printed.
So using the input file, only the >hg19_refGene_NM_001918_3... (10 Replies)
In the below I am trying to use awk to match all the $13 values in input, which is tab-delimited,
that are in $1 of gene which is just a single column of text.
However only the line with the greatest $9 value in input needs to be printed.
So in the example below all the MECP2 and LTBP1... (0 Replies)
In the bash below the out put of a process is written to input. What I am trying to do is read each line in the input and verify/check it for specific text (there are always 6 lines for each file and the specific text for each line is in the description). There will always be 6 lines in each... (5 Replies)
Discussion started by: cmccabe
5 Replies
LEARN ABOUT NETBSD
tail
TAIL(1) BSD General Commands Manual TAIL(1)NAME
tail -- display the last part of a file
SYNOPSIS
tail [-f | -F | -r] [-b number | -c number | -n number] [file ...]
DESCRIPTION
The tail utility displays the contents of file or, by default, its standard input, to the standard output.
The display begins at a byte, line or 512-byte block location in the input. Numbers having a leading plus (``+'') sign are relative to the
beginning of the input, for example, ``-c +2'' starts the display at the second byte of the input. Numbers having a leading minus (``-'')
sign or no explicit sign are relative to the end of the input, for example, ``-n 2'' displays the last two lines of the input. The default
starting location is ``-n 10'', or the last 10 lines of the input.
The options are as follows:
-b number
The location is number 512-byte blocks.
-c number
The location is number bytes.
-f The -f option causes tail to not stop when end of file is reached, but rather to wait for additional data to be appended to the
input. The -f option is ignored if the standard input is a pipe, but not if it is a FIFO.
-F The -F option is the same as the -f option, except that every five seconds tail will check to see if the file named on the command
line has been shortened or moved (it is considered moved if the inode or device number changes) and, if so, it will close the current
file, open the filename given, print out the entire contents, and continue to wait for more data to be appended. This option is used
to follow log files though rotation by newsyslog(8) or similar programs.
-n number
The location is number lines.
-r The -r option causes the input to be displayed in reverse order, by line. Additionally, this option changes the meaning of the -b,
-c and -n options. When the -r option is specified, these options specify the number of bytes, lines or 512-byte blocks to display,
instead of the bytes, lines or blocks from the beginning or end of the input from which to begin the display. The default for the -r
option is to display all of the input.
If more than a single file is specified, each file is preceded by a header consisting of the string ``==> XXX <=='' where ``XXX'' is the name
of the file.
The tail utility exits 0 on success, and >0 if an error occurs.
SEE ALSO cat(1), head(1), sed(1)STANDARDS
The tail utility is expected to be a superset of the IEEE Std 1003.2-1992 (``POSIX.2'') specification. In particular, the -b, -r and -F
options are extensions to that standard.
The historic command line syntax of tail is supported by this implementation. The only difference between this implementation and historic
versions of tail, once the command line syntax translation has been done, is that the -b, -c and -n options modify the -r option, i.e. ``-r
-c 4'' displays the last 4 characters of the last line of the input, while the historic tail (using the historic syntax ``-4cr'') would
ignore the -c option and display the last 4 lines of the input.
HISTORY
A tail command appeared in Version 7 AT&T UNIX.
BUGS
When using the -F option, tail will not detect a file truncation if, between the truncation and the next check of the file size, data written
to the file make it larger than the last known file size.
BSD June 6, 1993 BSD