In the above, where is it mentioned that it is a 'comma' separated field.
Nowhere. -F, sets the field separator.
Quote:
what does 'sep' denotes here. sep="|" i was thinking that it is a pipe separator.
That's a variable name, and yes, it's intended to be used a separator
Quote:
and what does s=s denotes here ?
It a variable assignment, but incompletely quoted. s=s sep $2 is the complete one, assigning the concatenation of s'(old) value, sep, and field two to (new) s .
Hi,
Could you please explain me the below statement -- phrase wise.
sed -e :a -e '$q;N;'$cnt',$D;ba' abc.txt > xyz.txt
if suppose $cnt contains value: 10
it copies last 9 lines of abc.txt to xyz.txt
why it is copying last 9 rather than 10.
and also what is ba and $D over there in... (4 Replies)
Hello everyone,
I found this command line in a website:
perl -pi.bak -we's/\z/Your new line\n/ if $. == 2;' your_text_file.txt
With this command line you can insert a new line anywhere you want in a text without overwriting what's in it.
-p causes perl to assume a loop around your... (4 Replies)
Hi
I have a line/command which greps certain pattern () from the file and 22 lines AFTER that:
nawk '/\/{c=22}c&&c--' input_file
Can somebody explain the coding in this command (what " c&&c-- " does)? and how to modify this command to output 22 lines BEFORE this pattern () Thanks a lot ... (3 Replies)
Hi all,
I need your help in understanding the meaning and syntax of the below nawk line.
Here is an extract of a script which I use daily and works well. The script extracts the hostnames and messages within a syslog file. I would also like to extract the message time in the 3rd column by... (2 Replies)
sed '$!N; /^\(.*\)\n\1$/!P; D'
i found this file which removes duplicates irrespective for sorted or unsorted file. keep first occurance and remove the further occurances.
can any1 explain how this is working..
i need to remove duplicates following file. duplicate criteria is not the... (3 Replies)
can anyone please tell me what does this expression means , i am under probation and need some explanation :)
$AUDIT_DIR -type f -mtime +$AUDIT_EXPIRE \ -exec rm {} > /dev/null 2>&1 \;
AUDIT_DIR="/var/log/"
AUDIT_EXPIRE='30'
Please use code tags! (4 Replies)
Hi All
I ran a script in Linux.
In the script i have lines like
&& echo "Failed: Missing ${CM_ENV_FILE} \n" && return 1
. ${CM_ENV_FILE}
Where CM_ENV_FILE = /data/ds/dpr_ebicm_uat//etl/cm3_0/entities/BBME/parameters/cm.env
But its taking this path... (1 Reply)
Hi everyone,
I am wondering if someone could please break down and explain the following sort command for me:
ls ${DEST_LOCATION}/${FILES} | sort -rt -k 4,4n | head -1
I have tried working it out using 'man sort', but on AIX there is not a great explanation of this function. I know that... (9 Replies)
Will someone give me an explanation on how the sed command below works.
sed 's/.*//'
Thanks! (3 Replies)
Discussion started by: scj2012
3 Replies
LEARN ABOUT DEBIAN
tcamgr
TCATEST(1) Tokyo Cabinet TCATEST(1)NAME
tcamgr - the command line utility of the abstract database API
DESCRIPTION
The command `tcamgr' is a utility for test and debugging of the abstract database API and its applications. `name' specifies the name of a
database. `key' specifies the key of a record. `value' specifies the value of a record. `params' specifies the tuning parameters.
`func' specifies the name of a function. `arg' specifies the arguments of the function. `dest' specifies the path of the destination
file.
tcamgr create name
Create a database file.
tcamgr inform name
Print miscellaneous information to the standard output.
tcamgr put [-sx] [-sep chr] [-dk|-dc|-dai|-dad] name key value
Store a record.
tcamgr out [-sx] [-sep chr] name key
Remove a record.
tcamgr get [-sx] [-sep chr] [-px] [-pz] name key
Print the value of a record.
tcamgr list [-sep chr] [-m num] [-pv] [-px] [-fm str] name
Print keys of all records, separated by line feeds.
tcamgr optimize name params
Optimize a database file.
tcamgr misc [-sx] [-sep chr] [-px] name func [arg...]
Call a versatile function for miscellaneous operations.
tcamgr map [-fm str] name dest
Map records into another B+ tree database.
tcamgr version
Print the version information of Tokyo Cabinet.
Options feature the following.
-sx : the input data is evaluated as a hexadecimal data string.
-sep chr : specify the separator of the input data.
-dk : use the function `tcadbputkeep' instead of `tcadbput'.
-dc : use the function `tcadbputcat' instead of `tcadbput'.
-dai : use the function `tcadbaddint' instead of `tcadbput'.
-dad : use the function `tcadbadddouble' instead of `tcadbput'.
-px : the output data is converted into a hexadecimal data string.
-pz : do not append line feed at the end of the output.
-m num : specify the maximum number of the output.
-pv : print values of records also.
-fm str : specify the prefix of keys.
This command returns 0 on success, another on failure.
SEE ALSO tcatest(1), tcamttest(1), tcadb(3), tokyocabinet(3)Man Page 2011-02-12 TCATEST(1)