CWI Institute in Amsterdam and Google genrate two PDF documents with the same SHA-1 digest. Google security blog - Announcing the first SHA1 collision SHA-1 collistion and Git If a file A with X hash in local repository and with X hash in remote (SHA-1 collistion between local and remote), would overwrite the local version? Nope. If it has the same SHA1, it means that when we receive the object from the other end, we will not overwrite the object we already have....
Advanced Bash-Scripting Guide sed awk Internal Variables #current parent pid $$ #last background process pid $! #last exit status $? #current instance pid, Bash 4.x above. $BASHPID Arithmetic Expansion a=12 b=$(($a + 10)) b=`expr $a + 1` b=$(expr $a + 1) let b=$a+3 #let b=$a + 3 #incorrect let "b = $a + 3" declare -i b=$a+$a Manipulating Strings String is a number if [[ $var =~ ^-?[0-9]+$ ]]; then echo "$var is a number" fi if [[ !...
clone MOC svn repository to github Ref: Converting a Subversion repository to Git $ sudo apt-get install subversion git-svn $ mkdir moc-svn $ cd moc-svn $ svn co svn://daper.net/moc/trunk $ svn log -q | awk -F '|' '/^r/ {sub("^ ", "", $2); sub(" $", "", $2); print $2" = "$2" <"$2">"}' | sort -u > authors-transform.txt $ cd .. $ mkdir moc-git $ git svn clone svn://daper.net/moc/trunk --no-metadata -A ./moc-svn/authors-transform.txt ....
Redirect port 8080 to 80 sudo iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-port 8080 Check iptables setting sudo iptables -t nat -L Save configure to iptables.rules sudo iptables-save > /etc/iptables.rules Save Solution #1 Configre /etc/network/interfaces iface eth0 inet dhcp pre-up iptables-restore < /etc/iptables.rules Save Solution #2 Configure /etc/network/if-pre-up.d/iptablesload #!/bin/sh iptables-restore < /etc/iptables.rules exit 0 Configure /etc/network/if-post-down.d/iptablessave #!/bin/sh iptables-save -c > /etc/iptables.rules if [ -f /etc/iptables.downrules ]; then iptables-restore < /etc/iptables....
Here is an error occurred if installed directly: install.sfx.XXX: not found Solution: install g++-mltilib and JDK $ sudo apt-get install g++-multilib $ chmod +x j2sdk-1_4_2_19-linux-i586.bin $ ./j2sdk-1_4_2_19-linux-i586.bin ..... Do you agree to the above license terms? [yes or no] yes Unpacking... Checksumming... 0 0 Extracting... UnZipSFX 5.40 of 28 November 1998, by Info-ZIP (Zip-Bugs@lists.wku.edu). creating: j2sdk1.4.2_19/ creating: j2sdk1.4.2_19/jre/ creating: j2sdk1.4.2_19/jre/bin/ inflating: j2sdk1.4.2_19/jre/bin/java inflating: j2sdk1.4.2_19/jre/bin/keytool inflating: j2sdk1.4.2_19/jre/bin/policytool .... Creating j2sdk1.4.2_19/lib/tools.jar Creating j2sdk1....
有時在整理照片或文件時, 需要比對2個資料匣, 把重覆的檔案拿掉. Dwonload Source Here function usage(){ echo "Find the same file in two folders and remove it." echo "usage : ./comp-rm.sh target-dir source-dir" echo "remove the same files in target-dir." } if [ $# -ne 2 ]; then usage exit 1 fi target_dir=$1 source_dir=$2 f_list1=$(find "$target_dir" -type f) f_list2=$(find "$source_dir" -type f) for i in $f_list1; do echo $f_list2 | grep $(basename $i) >/dev/null && hit_str+=$i";" done if [ -z $hit_str ]; then echo "list is empty....
boot_cm9.img file from mk802_legacy-compatibility_v1.zip Device: Rikomagic MK802 Script files : Split_bootimg.pl , extract-ikconfig ( in {kernel_source}/script ) Split boot.img Copy boot_cm9.img, Split_bootimg.pl, extract-ikconfig into ‘split_boot’ $ mkdir split_boot $ cd split_boot $ ./split_bootimg.pl boot_cm9.img Page size: 2048 (0x00000800) Kernel size: 8094708 (0x007b83f4) Ramdisk size: 178940 (0x0002bafc) Second size: 0 (0x00000000) Board name: Command line: console=ttyS0,115200 rw init=/init loglevel=8 Writing boot_cm9.img-kernel ... complete. Writing boot_cm9.img-ramdisk.gz ... complete. Get kernel image (boot_cm9.img-kernel) and ramdisk (boot_cm9....