I am a newbie in UNIX shell script and seeking help on this UNIX function. Please give me a hand. Thanks.
I have a large file. Named as 'MyFile'. It was tab-delmited. I am told to write a shell function that counts the number of occurrences of the ord “mysring” in the file 'MyFile'. (1 Reply)
I have a text (text.txt) and I would like to replace only the first 2 occurrences of a word (but I might need to replace more):
For example, if text is this:
CAR sweet head
hat red yellow
CAR book brown
tiger CAR cow CAR
CAR milk
I would like to replace the word "CAR" with word... (12 Replies)
Assistance on work Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
Files stored in ... (1 Reply)
Hello,
I have an output from GDB with many entries that looks like this
0x00007ffff7dece94 39 in dl-fini.c
0x00007ffff7dece97 39 in dl-fini.c
0x00007ffff7ab356c 50 in exit.c
0x00007ffff7aed9db in _IO_cleanup () at genops.c:1022
115 in dl-fini.c
0x00007ffff7decf7b in _dl_sort_fini (l=0x0,... (6 Replies)
I am trying to count the occurrences of ALL words in a file. However, I want to exclude certain words: short words (i.e. <3 chars), and words contained in an blacklist file. There is also a desire to count words that are capitalized (e.g. proper names). I am not 100% sure where the line on... (5 Replies)
Hi,
I have two text files (1.txt and 2.txt).
2.txt contains two columns which are extracted from 1.txt using a simple if(condition) print.
I want to:
- count how many times the values contained in 2.txt appear in 1.txt
-if they appear just one time, I have to delete the entire row in... (5 Replies)
Hi Gurus,
I'm scratching my head over and over and couldn't find the the right way to compose this AWK properly - PLEASE HELP :confused:
Input:
c,d,e,CLICK
a,b,c,CLICK
a,b,c,CONV
c,d,e,CLICK
a,b,c,CLICK
a,b,c,CLICK
a,b,c,CONV
b,c,d,CLICK
c,d,e,CLICK
c,d,e,CLICK
b,c,d,CONV... (6 Replies)
I was thinking something like this but it always gets rid of the file location.
grep -roh base. | wc -l
find . -type f -exec grep -o base {} \; | wc -l
Would this be a job for awk? Would I need to store the file locations in an array? (3 Replies)
Hi Friends ,
I am having one problem as stated file .
Having an input CSV file as shown in the code
U_TOP_LOGIC/U_HPB2/U_HBRIDGE2/i_core/i_paddr_reg_2_/Q,1,1,1,0,0,1,1,0,0,1,1,0,0,1,1,0,0,1,1,0,0,1,1,0,0,1,1,0,0,1,1,0,0,1,1,0,0,1,1,0,0,1,1,0,0,1,1,0,0,1,1,0,0,1,1,0,0,1,1,0,0,1,1,0,0,0,0... (4 Replies)
Discussion started by: kshitij
4 Replies
LEARN ABOUT FREEBSD
join
JOIN(1) BSD General Commands Manual JOIN(1)NAME
join -- relational database operator
SYNOPSIS
join [-a file_number | -v file_number] [-e string] [-o list] [-t char] [-1 field] [-2 field] file1 file2
DESCRIPTION
The join utility performs an ``equality join'' on the specified files and writes the result to the standard output. The ``join field'' is
the field in each file by which the files are compared. The first field in each line is used by default. There is one line in the output
for each pair of lines in file1 and file2 which have identical join fields. Each output line consists of the join field, the remaining
fields from file1 and then the remaining fields from file2.
The default field separators are tab and space characters. In this case, multiple tabs and spaces count as a single field separator, and
leading tabs and spaces are ignored. The default output field separator is a single space character.
Many of the options use file and field numbers. Both file numbers and field numbers are 1 based, i.e., the first file on the command line is
file number 1 and the first field is field number 1. The following options are available:
-a file_number
In addition to the default output, produce a line for each unpairable line in file file_number.
-e string
Replace empty output fields with string.
-o list
The -o option specifies the fields that will be output from each file for each line with matching join fields. Each element of list
has either the form file_number.field, where file_number is a file number and field is a field number, or the form '0' (zero), repre-
senting the join field. The elements of list must be either comma (',') or whitespace separated. (The latter requires quoting to
protect it from the shell, or, a simpler approach is to use multiple -o options.)
-t char
Use character char as a field delimiter for both input and output. Every occurrence of char in a line is significant.
-v file_number
Do not display the default output, but display a line for each unpairable line in file file_number. The options -v 1 and -v 2 may be
specified at the same time.
-1 field
Join on the field'th field of file1.
-2 field
Join on the field'th field of file2.
When the default field delimiter characters are used, the files to be joined should be ordered in the collating sequence of sort(1), using
the -b option, on the fields on which they are to be joined, otherwise join may not report all field matches. When the field delimiter char-
acters are specified by the -t option, the collating sequence should be the same as sort(1) without the -b option.
If one of the arguments file1 or file2 is '-', the standard input is used.
EXIT STATUS
The join utility exits 0 on success, and >0 if an error occurs.
COMPATIBILITY
For compatibility with historic versions of join, the following options are available:
-a In addition to the default output, produce a line for each unpairable line in both file1 and file2.
-j1 field
Join on the field'th field of file1.
-j2 field
Join on the field'th field of file2.
-j field
Join on the field'th field of both file1 and file2.
-o list ...
Historical implementations of join permitted multiple arguments to the -o option. These arguments were of the form
file_number.field_number as described for the current -o option. This has obvious difficulties in the presence of files named 1.2.
These options are available only so historic shell scripts do not require modification and should not be used.
SEE ALSO awk(1), comm(1), paste(1), sort(1), uniq(1)STANDARDS
The join command conforms to IEEE Std 1003.1-2001 (``POSIX.1'').
BSD July 5, 2004 BSD