#!/bin/bash cd /usr/src/linux make-kpkg clean INSTALL_MOD_STRIP=1 CONCURRENCY_LEVEL=3 make-kpkg --initrd \ --append-to-version=-custom kernel_image kernel_headers modules_image
sudo build-kernel
cat */* > /dev/nulltakes 63 seconds.
excited:~/archive.d/index$ du -h 1.5G ./offsite 1.4G ./onsite 2.9G .
package org.yi.happy;
import static org.junit.Assert.assertEquals;
import org.junit.Test;
public class DateReformatTest {
@Test
public void test1() {
String have = DateReformat.isoToAccess("2010-02-01 14:40");
assertEquals("02/01/2010", have);
}
}
package org.yi.happy;
public class DateReformat {
public static String isoToAccess(String value) {
return value.replaceAll(
"^(\\d\\d\\d\\d)-(\\d\\d)-(\\d\\d) \\d\\d:\\d\\d$",
"$2/$3/$1");
}
}
/**
* Find the position of the start of the first line in the file that is
* greater than or equal to the target line, using a binary search.
*
* @param file
* the file to search.
* @param target
* the target to find.
* @return the position of the first line that is greater than or equal to
* the target line.
* @throws IOException
*/
public static long search(RandomAccessFile file, String target)
throws IOException {
/*
* because we read the second line after each seek there is no way the
* binary search will find the first line, so check it first.
*/
file.seek(0);
String line = file.readLine();
if (line == null || line.compareTo(target) >= 0) {
/*
* the start is greater than or equal to the target, so it is what
* we are looking for.
*/
return 0;
}
/*
* set up the binary search.
*/
long beg = 0;
long end = file.length();
while (beg <= end) {
/*
* find the mid point.
*/
long mid = beg + (end - beg) / 2;
file.seek(mid);
file.readLine();
line = file.readLine();
if (line == null || line.compareTo(target) >= 0) {
/*
* what we found is greater than or equal to the target, so look
* before it.
*/
end = mid - 1;
} else {
/*
* otherwise, look after it.
*/
beg = mid + 1;
}
}
/*
* The search falls through when the range is narrowed to nothing.
*/
file.seek(beg);
file.readLine();
return file.getFilePointer();
}
file=2007-01-23-1520 out=index.txt paste <(cut -d $'\t' -f 3 $file) <(cut -d $'\t' -f 1,2,4,5,6 $file) | sort > $out
du | sort -nand working my way from the bottom of the list.
grep $'^onsite\t' volume.grid | cut -d $'\t' -f 4 | sort > on-onsite.lst grep $'^offsite\t' volume.grid | cut -d $'\t' -f 4 | sort > on-offsite.lstThen I take those sets away from the store list (outstanding = store - exist).
sort on-onsite.lst | comm -13 - store.lst > outstanding-onsite.lst sort on-offsite.lst | comm -13 - store.lst > outstanding-offsite.lstNow I take the intersection of those sets to find the keys not on either disk set, and the difference to find the keys that are only on one of the disk sets.
comm -12 outstanding-onsite.lst outstanding-offsite.lst > outstanding-common.lst comm -23 outstanding-onsite.lst outstanding-offsite.lst > outstanding-just-onsite.lst comm -13 outstanding-onsite.lst outstanding-offsite.lst > outstanding-just-offsite.lstAnd finally make the list in the order of preference for burning, giving priority to keys that are not on the backup disks yet.
cat outstanding-common.lst outstanding-just-onsite.lst > outstanding-onsite.lst cat outstanding-common.lst outstanding-just-offsite.lst > outstanding-offsite.lst
#!/bin/sh
url=http://out1.cbc.icy.abacast.com:80/cbc-cbcr1hfx-96
time=60
out=stream-`date +%Y-%m-%d-%H%M`.mp3
curl -s -G "$url" > "$out" &
curl_pid=$!
function cleanup() {
kill $curl_pid
}
trap cleanup EXIT
sleep $time
# cleanup gets implicitly called here
#!/usr/bin/env python
import sys, sqlite3
if len(sys.argv) != 3:
print "expected database file name and table name"
sys.exit()
file = sys.argv[1]
table = sys.argv[2]
def grid_escape(x):
if x == None:
return "\\N"
x = unicode(x)
return x.replace("\\", "\\\\").replace("\t", "\\t").replace("\n","\\n")
conn = sqlite3.connect(file)
c = conn.cursor()
c.execute('select * from ' + table)
print "\t".join([col[0] for col in c.description]).encode('utf-8')
for row in c:
print "\t".join(map(grid_escape,row)).encode('utf-8')
conn.close()
the grid escape function demonstrates how simple it is to encode that format, which is part of why I like it, it is trivial to produce in many languages.
sudo gconftool-2 --direct \ --config-source xml:readwrite:/etc/gconf/gconf.xml.defaults \ --type bool --set /apps/gdm/simple-greeter/disable_user_list true sudo gconftool-2 --direct \ --config-source xml:readwrite:/etc/gconf/gconf.xml.defaults \ --type bool --set /apps/gdm/simple-greeter/disable_restart_buttons true
sudo gconftool-2 --direct \ --config-source xml:readwrite:/etc/gconf/gconf.xml.defaults \ --type string --set /apps/gnome-power-manager/buttons/lid_ac blank sudo gconftool-2 --direct \ --config-source xml:readwrite:/etc/gconf/gconf.xml.defaults \ --type string --set /apps/gnome-power-manager/buttons/lid_battery blankto make the closing of the lid just blank the screen instead of going to sleep. I actually set these through the power configuration applet when I did them the first time.
smb.conf.[global] interfaces = 127.0.0.1 eth0 bind interfaces only = yes
smb.conf file, I was left with a nice short file that works. The objective was to have the home directory available for users that are configured, and a public directory for anyone, also there should be no permissions restrictions on the public directory, people should be able to modify each others files./etc/samba/smb.conf file is[global] dns proxy = no map to guest = Bad User guest account = guest unix extensions = no server string = Home server log file = /var/log/samba/log.%m max log size = 1000 syslog = 0 [homes] browsable = no read only = no valid users = %S [public] read only = no guest ok = yes force user = guest path = /export/public
sudo useradd guest -m -p \*
sudo mkdir /export sudo mkdir /export/public sudo chown guest /export/public
#!/usr/bin/python
import sys, sqlite3
if len(sys.argv) != 2:
print "expected database file name"
sys.exit()
file = sys.argv[1]
conn = sqlite3.connect(file)
c = conn.cursor()
c.execute('select name from sqlite_master where type=\'table\'')
for table in c:
print table[0]
conn.close()
/etc/gdm/custom.conf containing[xdmcp] Enable=trueand restarted gdm
sudo restart gdmwhich enabled XDMCP.
sudo apt-get install vnc4serverwhich will provide the X server for VNC logins.
sudo apt-get install xinetdso that the vnc service can be configured.
/etc/xinetd.d/vncservice vnc
{
type = UNLISTED
port = 5900
only_from = localhost 192.168.0.0/24
disable = no
socket_type = stream
protocol = tcp
wait = no
user = nobody
server = /usr/local/bin/xvnc-inetd
}
and the script /usr/local/bin/xvnc-inetd#!/bin/sh exec /usr/bin/Xvnc \ -inetd \ -query localhost \ -once \ -SecurityTypes=None \ -pn \ -extension XFIXESwhich was named in the configuration. The script is just to keep the line lengths down, making things look cleaner.
sudo /etc/init.d/xinetd restart
sudo apt-get install vnc4server
sudo apt-get install xinetd
/etc/services (if it is not already listed in that file)vnc 5600/tcp
/etc/xinetd.d/vnc)service vnc
{
only_from = localhost 192.168.0.0/24
disable = no
id = vnc
socket_type = stream
protocol = tcp
wait = no
user = nobody
server = /usr/bin/Xvnc4
server_args = -inetd -query localhost -once -SecurityTypes=None -extension XFIXES -pn -fp /usr/share/fonts/X11/misc/,/usr/share/fonts/X11/75dpi/,/usr/share/fonts/X11/100dpi/
log_on_failure += USERID
}
server_args = -inetd -query localhost -once -SecurityTypes=None -extension XFIXES -pn -fp /usr/share/fonts/X11/misc/,/usr/share/fonts/X11/75dpi/,/usr/share/fonts/X11/100dpi/, which I could put into a script somewhere to make the line shorter, if I feel the need later.total = \sum{\lceil\frac{size}{2048}\rceil}2048
174 + \lfloor\frac{count}{42}\rfloor + \sum{\lceil\frac{size}{2048}\rceil}
where the 174 is the disk overhead including padding, super blocks, and path tables; count is the number of file names on the disk, and size is the size of each file. This can be calculated incrementally with just two variables, a count and the sum of sizes so far.#!/usr/bin/perl -w
use strict;
use POSIX;
sub sum {
my $out = 0;
for(@_) {
$out += $_;
}
return $out;
}
my @sizes = ( 2048 ) x 1000;
my $file_count = @sizes;
my $data_size = sum(map { ceil($_ / 2048) } @sizes);
my $dir_size = floor( $file_count / 42 ) + 1;
my $overhead = 173;
my $size = $overhead + $dir_size + $data_size;
$\ = "\n";
print $size;
package org.yi.happy.pdf;
import java.io.FileOutputStream;
import com.itextpdf.text.Document;
import com.itextpdf.text.pdf.PdfCopy;
import com.itextpdf.text.pdf.PdfImportedPage;
import com.itextpdf.text.pdf.PdfReader;
public class PdfSplitMain {
public static void main(String[] args) throws Exception {
if (args.length < 1) {
System.out.println("use: infile [outbase]");
return;
}
String inFile = args[0];
String outBase;
if (args.length < 2) {
if (inFile.endsWith(".pdf")) {
outBase = inFile.substring(0, inFile.length() - 4) + "-";
} else {
outBase = inFile;
}
} else {
outBase = args[1];
}
PdfReader reader = new PdfReader(inFile);
try {
for (int i = 1; i <= reader.getNumberOfPages(); i++) {
String outFile = outBase + String.format("%04d", i) + ".pdf";
Document document = new Document();
FileOutputStream output = new FileOutputStream(outFile);
try {
PdfCopy writer = new PdfCopy(document, output);
document.open();
PdfImportedPage page = writer.getImportedPage(reader, i);
writer.addPage(page);
document.close();
writer.close();
} finally {
output.close();
}
}
} finally {
reader.close();
}
}
}
package org.yi.happy.pdf;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.util.Arrays;
import com.itextpdf.text.Document;
import com.itextpdf.text.pdf.PdfCopy;
import com.itextpdf.text.pdf.PdfImportedPage;
import com.itextpdf.text.pdf.PdfReader;
public class PdfJoinMain {
public static void main(String[] args) throws Exception {
if (args.length < 2) {
System.out.println("use: output input...");
return;
}
String[] pdfs = Arrays.copyOfRange(args, 1, args.length);
OutputStream output = new FileOutputStream(args[0]);
try {
Document document = new Document();
PdfCopy writer = new PdfCopy(document, output);
document.open();
for (String pdf : pdfs) {
FileInputStream input = new FileInputStream(pdf);
try {
PdfReader reader = new PdfReader(input);
for (int p = 1; p <= reader.getNumberOfPages(); p++) {
PdfImportedPage page = writer
.getImportedPage(reader, p);
writer.addPage(page);
}
} finally {
input.close();
}
}
document.close();
writer.close();
} finally {
output.close();
}
}
}
grid := line* line := field* ( cr | lf | cr lf ) field := ( [ not cr lf tab "\" ] | "\r" | "\n" | "\t" | "\\" )* | "\N"
2 = \log x
To solve this, first exponent both sides on 10, which will reverse the log. The hard part seems to be here.10^2 = 10^{\log x}
and simplify (10^{\log x} = x).100 = x
2 = \log 2x
put both sides as exponents of 1010^2 = 10^{\log 2x}
simplify100 = 2x
divide both sides by 2\frac{100}{2} = \frac{2x}{2}
simplify50 = x
2 = \log\left( 2x + 1 \right)
put both as exponents of 1010^2 = 10^{\log\left( 2x + 1 \right)}
simplify100 = 2x + 1
subtract 1 from both sides100 - 1 = 2x + 1 - 1
simplify99 = 2x
divide both sides by two\frac{99}{2} = \frac{2x}{2}
simplify\frac{99}{2} = x
2 = \ln\log x
The \ln x is the outside log, so it needs to be dealt with first, make both sides exponents of ee^2 = e^{\ln\log x}
simplifye^2 = \log x
make both sides exponents of 1010^{e^2} = 10^{\log x}
simplify10^{e^2} = x
2 = e^{\log x}
First there is the e^x to deal with, so take the natural logarithm of both sides.\ln 2 = \ln e^{\log x}
simplify\ln 2 = \log x
and put both sides on an exponent of 10, as in the previous solutions10^{\ln 2} = 10^{\log x}
simplify10^{\ln 2} = x
2 = 1, which is also false, now I am going to show where it went wrong, by doing the same steps as before, using the same forms as before.a = b
b = b
bb + b = b + b
2b = b + b
2b2b - 2b = b + b - 2b
2b - 2b = b + (1-2)b
2b - 2b = b + (-1)b
2b - 2b = b - b
(b - b)2(b - b) = 1(b - b)
(b - b), which is also known as zero.\frac{2(b - b)}{b - b} = \frac{1(b - b)}{b - b}
2\left(\frac{b - b}{b-b}\right) = 1\left(\frac{b - b}{b-b}\right)
2(1) = 1(1)
2 = 1