I have a file wich has several fields separated by space. I want to remove all the fields which are not the client_name.
I mean the field which are not "pfizer","csx" and "mafoi". And the deletion action will be taken place from the 3rd field(including the third field).
Hi,
Just consider there are around 10 lines in a file. Now is it possible to delete the first 2 lines in the file without opening the file. No matter whatever the content of the file is, I just wanna delete the first 2 lines without opening the file. Is that possible? If so, please help me out.... (3 Replies)
Hi,
I need to create recursive tar archive, while I put there only files of type a*.txt.
Without file filtering the command is: tar cfzf test.tar.gz test_tar/
How I include the switch for including only files with pattern a*.txt ?
Thanks a lot! (1 Reply)
Is it possible to make the search in regular exprecion or in matching parts of sed, nawk and others to IGNORE the case of the search string?
I mean, like if used 'grep' with -i option:
> grep -i "abc" file
I would like to be able to do the same, say, by nawk:
> nawk '/abc/ {print $0}'... (4 Replies)
I have a script which I use to archive log files and I want to install it on another server. I match any file with a ".log" in the name. Most files end with ".log" or ".log.nnnn". Of course someone has a file on this server that they do not want to archive that has .login.ear in the file name and... (1 Reply)
Hello ,
I have comma delimited file with over 20 fileds that i need to do some validations on. I have to check if certain fields are null and then write the line containing the null field into a new file and then delete the line from the current file.
Can someone tell me how i could go... (2 Replies)
I need a way to remove all the file names with they are extension from a line of a document. For example:
I have doc named "gara" with the following content:
/media/gogo/6651-FEAB/Desktop/Desktop.jpg
/media/gogo/6651-FEAB/Desktop.pdf
/media/gogo/6651-FEAB/linux/logo1.jpg... (4 Replies)
Hi
I have a file:
r58778.3|SOURCES={KEY=f665931a...,fw,221-705}|ERRORS={16_1:T,30_1:T,56_1:C,57_1:T,59_1:A,101_1:A,115:-,158_1:C,186_1:A,204:-,271_1:T,305:-,350_1:C,368_1:G,442_1:C,472_1:G,477_1:A}|SOURCE_1="Contig_1092402550638"(f665931a359e36cea0976db191ff60ff09cc816e)
I want to retain... (15 Replies)
When I try with patern matching in a file with below code works
cat scj_drive_commands | egrep '/app/oracle/build_lib/pkg32|/app/oracle/build_lib/pkg33'
But when I have code with patern searching using of below does not work !
cat scj_drive_commands | egrep... (3 Replies)
Request: grep to find given matching patern and return unique values, eliminate the duplicate values
I have to retrieve the unique folder on the below file contents like;
/app/oracle/build_lib/pkg320.0_20120927
/app/oracle/build_lib/pkg320.0_20121004_prof... (5 Replies)
Hello,
I have in my backup folder, files with names convention like this :
randomFileNames_13-02-2014_23h13m09+1392333189
randomFileNames_14-02-2014_02h13m09+1392343989
randomFileNames_14-02-2014_04h13m09+1392351189
etc....
Base on timestamp at end of the filename, I would to delete all the... (7 Replies)
Discussion started by: thuyetti
7 Replies
LEARN ABOUT CENTOS
ipsec_ranbits
IPSEC_RANBITS(8) [FIXME: manual] IPSEC_RANBITS(8)NAME
ipsec_ranbits - generate random bits in ASCII form
SYNOPSIS
ipsec ranbits [--quick] [--continuous] [--bytes] nbits
DESCRIPTION
Ranbits obtains nbits (rounded up to the nearest byte) high-quality random bits from random(4), and emits them on standard output as an
ASCII string. The default output format is datatot(3) h format: lowercase hexadecimal with a 0x prefix and an underscore every 32 bits.
The --quick option produces quick-and-dirty random bits: instead of using the high-quality random bits from /dev/random, which may take
some time to supply the necessary bits if nbits is large, ranbits uses /dev/urandom, which yields prompt results but lower-quality
randomness.
The --continuous option uses datatot(3) x output format, like h but without the underscores.
The --bytes option causes nbits to be interpreted as a byte count rather than a bit count.
FILES
/dev/random, /dev/urandom
SEE ALSO ipsec_datatot(3), random(4)HISTORY
Written for the Linux FreeS/WAN project <http://www.freeswan.org> by Henry Spencer.
BUGS
There is an internal limit on nbits, currently 20000.
Without --quick, ranbits's run time is difficult to predict. A request for a large number of bits, at a time when the system's entropy pool
is low on randomness, may take quite a while to satisfy.
Though not a bug of ranbits, the direct use of /dev/hw_random, the Linux hardware random number generator is not supported because it can
produce very non-random data. To properly use /dev/hw_random, the rngd daemon should be used to read from /dev/hw_random and write to
/dev/random, while performing a FIPS test on the hardware random read. No changes to Openswan are required for this support - just a
running rngd.
[FIXME: source] 10/06/2010 IPSEC_RANBITS(8)