I have a file:
Fred
Fred
Fred
Jim
Fred
Jim
Jim
If sort is executed on the listed file, shouldn't the output be?:
Fred
Fred
Fred
Fred
Jim
Jim
Jim (3 Replies)
Using the last, uniq, sort and cut commands, determine how many times the different users have logged in.
I know how to use the last command and cut command...
i came up with last | cut -f1 -d" " | uniq
i dont know if this is right, can someone please help me... thanks (1 Reply)
Input File is :
-------------
25060008,0040,03,
25136437,0030,03,
25069457,0040,02,
80303438,0014,03,1st
80321837,0009,03,1st
80321977,0009,03,1st
80341345,0007,03,1st
84176527,0047,03,1st
84176527,0047,03,
20000735,0018,03,1st
25060008,0040,03,
I am using the following in the script... (5 Replies)
Hello,
I have a large data file:
1234 8888 bbb
2745 8888 bbb
9489 8888 bbb
1234 8888 aaa
4838 8888 aaa
3977 8888 aaa
I need to remove duplicate lines (where the first column is the duplicate). I have been using:
sort file.txt | uniq -w4 > newfile.txt
However, it seems to keep the... (11 Replies)
Hi All,
I have a text file with the format shown below. Some of the records are duplicated with the only exception being date (Field 15). I want to compare all duplicate records using subscriber number (field 7) and keep only those records with greater date.
... (1 Reply)
I have a flatfile A.txt
2012/12/04 14:06:07 |trees|Boards 2, 3|denver|mekong|mekong12
2012/12/04 17:07:22 |trees|Boards 2, 3|denver|mekong|mekong12
2012/12/04 17:13:27 |trees|Boards 2, 3|denver|mekong|mekong12
2012/12/04 14:07:39 |rain|Boards 1|tampa|merced|merced11
How do i sort and get... (3 Replies)
Hi again,
I have files with the following contents
datetime,ip1,port1,ip2,port2,number
How would I find out how many times ip1 field shows up a particular file? Then how would I find out how many time ip1 and port 2 shows up?
Please mind the file may contain 100k lines. (8 Replies)
Hello all,
Need to pick your brains,
I have a 10Gb file where each row is a name, I am expecting about 50 names in total. So there are a lot of repetitions in clusters.
So I want to do a
sort -u file
Will it be considerably faster or slower to use a uniq before piping it to sort... (3 Replies)
Hi All,
Below the actual file which i like to sort and Uniq -u
/opt/oracle/work/Antony/Shell_Script> cat emp.1st
2233|a.k. shukula |g.m. |sales |12/12/52 |6000
1006|chanchal singhvi |director |sales |03/09/38 |6700... (8 Replies)
Discussion started by: Antony Ankrose
8 Replies
LEARN ABOUT LINUX
dpkg::index
Dpkg::Index(3) libdpkg-perl Dpkg::Index(3)NAME
Dpkg::Index - generic index of control information
DESCRIPTION
This object represent a set of Dpkg::Control objects.
FUNCTIONS
my $index = Dpkg::Index->new(%opts)
Creates a new empty index. See set_options() for more details.
$index->set_options(%opts)
The "type" option is checked first to define default values for other options. Here are the relevant options: "get_key_func" is a
function returning a key for the item passed in parameters. The index can only contain one item with a given key. The function used
depend on the type: for CTRL_INFO_PKG, CTRL_INDEX_SRC, CTRL_INDEX_PKG and CTRL_PKG_DEB it's simply the Package field; for CTRL_PKG_SRC
and CTRL_INFO_SRC, it's the Source field; for CTRL_CHANGELOG it's the Source and the Version fields (concatenated with an intermediary
"_"); for CTRL_FILE_CHANGES it's the Source, Version and Architecture fields (concatenated with "_"); for CTRL_FILE_VENDOR it's the
Vendor field; for CTRL_FILE_STATUS it's the Package and Architecture fields (concatenated with "_"). Otherwise it's the Package field
by default.
$index->get_type()
Returns the type of control information stored. See the type parameter set during new().
$index->add($item, [$key])
Add a new item in the index. If the $key parameter is omitted, the key will be generated with the get_key_func function (see
set_options() for details).
$index->load($file)
Reads the file and creates all items parsed. Returns the number of items parsed. Handles compressed files transparently based on their
extensions.
$index->parse($fh, $desc)
Reads the filehandle and creates all items parsed. Returns the number of items parsed.
$index->save($file)
Writes the content of the index in a file. Auto-compresses files based on their extensions.
my $item = $index->new_item()
Creates a new item. Mainly useful for derived objects that would want to override this method to return something else than a
Dpkg::Control object.
my $item = $index->get_by_key($key)
Returns the item identified by $key or undef.
my @keys = $index->get_keys(%criteria)
Returns the keys of items that matches all the criteria. The key of the %criteria hash is a field name and the value is either a regexp
that needs to match the field value, or a reference to a function that must return true and that receives the field value as single
parameter, or a scalar that must be equal to the field value.
my @items = $index->get(%criteria)
Returns all the items that matches all the criteria.
$index->remove_by_key($key)
Remove the item identified by the given key.
my @items = $index->remove(%criteria)
Returns and removes all the items that matches all the criteria.
$index->merge($other_index, %opts)
Merge the entries of the other index. While merging, the keys of the merged index are used, they are not re-computed (unless you have
set the options "keep_keys" to "0"). It's your responsibility to ensure that they have been computed with the same function.
$index->sort(&sortfunc)
Sort the index with the given sort function. If no function is given, an alphabetic sort is done based on the keys. The sort function
receives the items themselves as parameters and not the keys.
my $str = $index->output()
"$index"
Get a string representation of the index. The Dpkg::Control objects are output in the order which they have been read or added except
if the order hae been changed with sort().
$index->output($fh)
Print the string representation of the index to a filehandle.
AUTHOR
Raphael Hertzog <hertzog@debian.org>.
1.16.0.3 2012-04-17 Dpkg::Index(3)