As part of a bigger task, I had to read thru a file and separate records into various batches based on a field. Specifically, separate records based on the value in the batch field as defined below. The batch field left-justified numbers.
The datafile is here
> cat infile
12345 1 John Smith ... (5 Replies)
what is the correct command for finding the largest file and displaying it without any error information?
I can find it, but how do I display it in the same command? (6 Replies)
Hello,
I have got one file with more than 120+ million records(35 GB in size). I have to extract some relevant data from file based on some parameter and generate other output file.
What will be the besat and fastest way to extract the ne file.
sample file format :--... (2 Replies)
Hi,
I have a huge file say with 2000000 records. The file has 42 fields. I would like to pick randomly 1000 records from this huge file. Can anyone help me how to do this? (1 Reply)
Dear list
its my first post and i would like to greet everyone
What i would like to do is select records 7 and 11 from each files in a folder then run an executable inside the script for the selected parameters.
The file format is something like this
7 100 200
7 100 250
7 100 300 ... (1 Reply)
Hello gurus,
I am new to "awk" and trying to break a large file having 4 million records into several output files each having half million but at the same time I want to keep the similar key records in the same output file, not to exist accross the files.
e.g. my data is like:
Row_Num,... (6 Replies)
Hello:
I am new to shell script programming. Now I would like to select specific records block from a file. For example, current file "xyz.txt" is containing 1million records and want to select the block of records from line number 50000 to 100000 and save into a file. Can anyone suggest me how... (3 Replies)
Hello All,
I have a large file, more than 50,000 lines, and I want to split it in even 5000 records. Which I can do using
sed '1d;$d;' <filename> | awk 'NR%5000==1{x="F"++i;}{print > x}'Now I need to add one more condition that is not to break the file at 5000th record if the 5000th record... (20 Replies)
Hi All
I would like to modify a file like this:
>antax gioq21 tris notes
abcdefghij
klmnopqrs
>betax gion32 ter notes2
tuvzabcdef
ahgskslsooin this:
>tris
abcdefghij
klmnopqrs
>ter
tuvzabcdef
ahgskslsoo
So, I would like to remove the first two fields(and output field 3) in record... (4 Replies)
Discussion started by: giuliangiuseppe
4 Replies
LEARN ABOUT DEBIAN
apt-key
APT-KEY(8) APT APT-KEY(8)NAME
apt-key - APT key management utility
SYNOPSIS
apt-key [--keyring filename] {add filename | del keyid | export keyid | exportall | list | finger | adv | update | net-update |
{-v | --version} | {-h | --help}}
DESCRIPTION
apt-key is used to manage the list of keys used by apt to authenticate packages. Packages which have been authenticated using these keys
will be considered trusted.
COMMANDS
add filename
Add a new key to the list of trusted keys. The key is read from the filename given with the parameter filename or if the filename is -
from standard input.
del keyid
Remove a key from the list of trusted keys.
export keyid
Output the key keyid to standard output.
exportall
Output all trusted keys to standard output.
list
List trusted keys.
finger
List fingerprints of trusted keys.
adv
Pass advanced options to gpg. With adv --recv-key you can download the public key.
update
Update the local keyring with the archive keyring and remove from the local keyring the archive keys which are no longer valid. The
archive keyring is shipped in the archive-keyring package of your distribution, e.g. the debian-archive-keyring package in Debian.
net-update
Perform an update working similarly to the update command above, but get the archive keyring from a URI instead and validate it against
a master key. This requires an installed wget(1) and an APT build configured to have a server to fetch from and a master keyring to
validate. APT in Debian does not support this command, relying on update instead, but Ubuntu's APT does.
OPTIONS
Note that options need to be defined before the commands described in the previous section.
--keyring filename
With this option it is possible to specify a particular keyring file the command should operate on. The default is that a command is
executed on the trusted.gpg file as well as on all parts in the trusted.gpg.d directory, though trusted.gpg is the primary keyring
which means that e.g. new keys are added to this one.
FILES
/etc/apt/trusted.gpg
Keyring of local trusted keys, new keys will be added here. Configuration Item: Dir::Etc::Trusted.
/etc/apt/trusted.gpg.d/
File fragments for the trusted keys, additional keyrings can be stored here (by other packages or the administrator). Configuration
Item Dir::Etc::TrustedParts.
/etc/apt/trustdb.gpg
Local trust database of archive keys.
/usr/share/keyrings/debian-archive-keyring.gpg
Keyring of Debian archive trusted keys.
/usr/share/keyrings/debian-archive-removed-keys.gpg
Keyring of Debian archive removed trusted keys.
SEE ALSO apt-get(8), apt-secure(8)BUGS
APT bug page[1]. If you wish to report a bug in APT, please see /usr/share/doc/debian/bug-reporting.txt or the reportbug(1) command.
AUTHOR
APT was written by the APT team <apt@packages.debian.org>.
AUTHORS
Jason Gunthorpe
APT team
NOTES
1. APT bug page
http://bugs.debian.org/src:apt
APT 0.9.7.9 09 June 2012 APT-KEY(8)