java servlet printing from intranet printer on Debian

 apt-get install cups cups-bsd

cups-bsd contain lpr command

lpstat -p

lpadmin -d printername // set default printer

postgresql replication with docker-compose in AS1102T

docker-compose.yml

version: '2'

services:

  postgresql-slave:

    image: 'postgres:13'

    ports:

      - '5433:5433'

    environment:

      - POSTGRES_USERNAME=postgres

      - POSTGRES_PASSWORD=password

    volumes:

      - ../postgresql/data:/var/lib/postgresql/data

    networks:

      - disable_ipv6

networks:

  disable_ipv6:

    external: true

postgresql-master
    su postgres 

    psql -p 5433 

    CREATE USER replicator WITH REPLICATION ENCRYPTED PASSWORD 'password'; 

    SELECT * FROM pg_create_physical_replication_slot('replication_slot_slave1');

 postgresql.conf: 

     wal_level = replica 

 pg_hba.conf: 

     host replication replicator 0.0.0.0/0 trust 

postgresql-slave
exec docker-compose

    docker-compose exec -it postgresql-slave bash 

    cd /var/lib/postgresql/data  

    postgresql.conf: 

       wal_level = replica 

       primary_conninfo = 'user=replicator password=password channel_binding=prefer host=masterip port=5433 sslmode=prefer sslcompression=0 ssl_min_protocol_version=TLSv1.2 gssencmode=prefer krbsrvname=postgres target_session_attrs=any'

       primary_slot_name = 'replication_slot_slave1'

       hot_standby = on 

       restore_command = 'cp /var/lib/postgresql/data/pg_wal/%f "%p"' 

    mkdir masterdata 

    cd masterdata 

    pg_basebackup -h masterip -U replicator -p 5433 -D ./ -Fp -Xs -P -R -W 

    exit 

    docker-compose stop 

    postgresq/data: 

        mv *.conf ../ 

        mv masterdata ../ 

        rm -rf * 

        mv ../*.conf ./ 

        mv masterdata/* ./ 

    docker-compose start 

postgresql-master 

    su postgres 

    psql -p 5433 

    select * from pg_stat_replication;

    SELECT * FROM pg_replication_slots;

Debian apt-get update with error: timeout was reached

       記得那時有多一顆硬碟就把/var另外備份到多的硬碟再重新掛載。結果有一天硬碟掛了，舊有的/var資料比較舊、dpkg都亂了。只好強制升級，跑完升級後都會出現error: timeout was reached。

       勉強撐過一段時間之後終於有時間來找找解決辦法，東找找西找找最後發現沒裝packagekit，apt-get install packagekit之後就沒看見錯誤了。

Openwrt with RAIDON-BX32N(SL3650-LB2)

升級檔案->https://github.com/phchshow/openwrt-raidon-bx32n        

        前幾個禮拜突然想到很久之前買的儲存設備閒置，本來想趁著SSD便宜組個RAID1玩一下。結果設備有點舊，雖然在官網上可以找到升級檔，但是一樣舊，kernel版本只有2.6.31。

        本來想說修改升級檔讓admin取得root權限就好，順便跑跑debootstrap裝個minidlna發揮最後的殘值。但是還是有點不甘心，只好靠著幾年之前有稍微研究Android 2.3時有買uart的USB設備來碰碰運氣，明明看其他oxnas的只需要插三個pin。但是我用就沒辦法看到，只好去找先前是買什麼，才看到買的供電要由設備端供應，拿出三用電錶也只確認接地，一陣亂插之下運氣不錯可以看到uboot開機資訊。結果沒辦法輸入，後來東碰碰西碰碰另外兩條線碰在一起就可以輸入了，整個傻眼。

        原先想用其他oxnas版本來碰碰運氣看能不能直升，結果分區都不一樣，只能再研究研究怎麼編Openwrt，一研究就是好幾天，畢竟不是本科，靠著一些薄弱的知識東找西找總算是能夠生出一個穩定版本的Openwrt。不過也只限定在硬碟跟USB算穩定，LED燈跟風扇不知道怎麼控制。應該是i2c跟gpio，電路板也看不懂，有時間再來學習。

        最後雖然可以跑新的kernel，卻又受限在設備是32位元的，本來想跑Postgresql replication卻跑不了，再來想想能跑什麼服務。

 

compile tiap_drv.ko

make -C system/wlan/ti/WiLink_AP/platforms/os/linux KERNEL_DIR= $(KERNEL) ARCH="arm" CROSS_COMPILE="$(ANDROID_BUILD_TOP)/prebuilt/linux-x86/toolchain/arm-eabi-4.4.3/bin/arm-eabi-" HOST_PLATFORM="zoom2" REPORT_LOG=n

ramdisk and devtree for flipout

ramdisk:
    ./split_bootimg.pl CG35.smg
    mkdir ramdisk
    cd ramdisk
    gzip -dc ../CG35.smg-ramdisk.gz | cpio -i

    to new ramdisk:
    find . | cpio -o -H newc | gzip > ../newramdisk

devtree:
    apt-get install device-tree-compiler
    get device-tree directory from phone /proc
    dtc -f -I fs -O dtb -o devtree device-tree

reference: ramdisk:xda

ruth(MB511) device configure files for CM7, update rom status: RC Version 5

My ROM VERSION:
RUTEM_U3_01.14.16_DEBLUR_SIGNED_USARUTH15ND0RTINT056.0R_PDS000_USARUTHEHKTWEMARA_P011_A010_HWp3_1FF.sbf

RC version 5: v0.7.4
configure sources
gapps.zip

NOTICE:If you want update fix zip, you should use bootmenu to update.When boot at motologo,click click and click "vol -" to enter bootmenu. 

->because bootmenu executed by mot_boot_mode, so /system can't umount, only can remount.

--and update zip have to modify updater-script, remount /system.

can work:

camera

battd

fmradio

bluetooth

gps

sensors

usb connect

audio

half work:

video

-> 720p has problem.

wifi

->no softap.

ril

->I only use 2G service, so I can't test 3G.