I need to write a script that maintains many directories. I was wondering is there is a way to create a list of the directories inside a script so that you can then use “while read line” to perform different commands for each directory.
Something like this
#!/bin/sh
MYLIST:
/dir1
/dir2... (1 Reply)
Hi All,
Can I use AWK script to read data from Oracle table (some embedded SQL perhaps) The reason for this that I have a data file and I need to do some basic validations of the data in the file with some statistical figures related to the data file that I have stored in a Oracle table.
Thanks... (2 Replies)
Hi ,
well at the beginning i simply type :
cat file.1|grep 'update process'
but for looping and table needs , i wanted to do the following :
var1="grep 'update process'"
cat file1|"var1"
and i got error :
grep: can't open update
grep: can't open process
when it works if i... (6 Replies)
I'm running into a problem with a differential backup script written in GNU Bash 3.0 - the following stripped down code demonstrates the problem quite nicely.
$ DATE="last tuesday"
$ date --date="$DATE"
Tue Jan 6 00:00:00 PST 2009
So far so good.
$ CMD="date --date=\"$DATE\""
$... (6 Replies)
hi all, i am new to this..i have some bash scripts that i would like to run on a microcontroller.. do i have to load a Linux/UNIX OS first? how do I do this? are there any good links to read about this? any help appreciated.. (1 Reply)
Hi,
I am encoding the username and password to the url and use it with wget.
I.e wget ftp://username:password@myserver.com/test.mp3
However this does not work if the password contains @ character. if the password contains @, then the encoded url becomes
wget... (1 Reply)
Hi,
I dont know whether it is the right space to put it... but didnt found related Embedded.
I want to start learning Embedded systems in Unix, It would be greatly appreciable if someone could help me to start off ....
Thanks (0 Replies)
i have a problem in Use static variables in Qt C++ under CentOS 5.5
i need to pass a variable from GUI to class all function are static.
it always give me that error error: undefined reference to strChar
class QPython : public QObject
{
private:
public:
QString strChar;
static PuObject*... (1 Reply)
Greetings all,
i have csv file with pipe separated columns
SSN|NAME|ADDRESS|FILLER
123|abc|myaddress|xxx
234|BBB|my
add
ress
broken up|yyy
In the example above, the second record is broken into multiple lines. I need to keep going until I find a "|" since this issue is with the... (14 Replies)
Discussion started by: stayalive
14 Replies
LEARN ABOUT DEBIAN
cdbmake
cdbmake(1) General Commands Manual cdbmake(1)NAME
cdbmake - create a constant database
SYNOPSIS
cdbmake cdb cdb.tmp
DESCRIPTION
cdbmake reads a series of encoded records from its standard input and writes a constant database to cdb.
cdbmake ensures that cdb is updated atomically, so programs reading cdb never have to wait for cdbmake to finish. It does this by first
writing the database to cdb.tmp and then moving cdb.tmp on top of cdb. If cdb.tmp already exists, it is destroyed. The directories con-
taining cdb.tmp and cdb must be writable to cdbmake; they must also be on the same filesystem.
cdbmake always makes sure that cdb.tmp is safely written to disk before it replaces cdb. If the input is in a bad format or if cdbmake has
any trouble writing cdb.tmp to disk, cdbmake complains and leaves cdb alone.
RECORD FORMAT
Records are indexed by keys. A key is a string. cdb is structured so that another program, starting from a key, can quickly find the rel-
evant record. cdbmake allows several records with the same key, although most readers take only the first record, and cdbmake slows down
somewhat if there are many records with the same key.
cdbmake and cdbdump(1) preserve the order of records.
A record is encoded for cdbmake as +klen,dlen:key->data followed by a newline. Here klen is the number of bytes in key and dlen is the
number of bytes in data. The end of data is indicated by an extra newline. For example:
+3,5:one->Hello
+3,7:two->Goodbye
key and data may contain any characters, including colons, dashes, newlines, and nulls.
Keys and data do not have to fit into memory. A database cannot exceed 4 gigabytes.
cdb is portable across machines.
SEE ALSO cdbdump(1), cdbget(1), cdbstats(1)cdbmake(1)