![[Ubuntu] 顯示 Welcome Message](https://caloskao.org/wp-content/uploads/2018/02/screenshot_2018-02-21_09-59-31_001.png)
登入 Linux 時會執行 /etc/update-motd.d 下的腳本
所以想要觀看的話除了重新登入以外，以迴圈執行即可
for i in /etc/update-motd.d/*; do sudo $i; done
或是用 find 指令結合其 -exec 參數也可以達到相同效果
sudo find /etc/update-motd.d -type f -exec {} \;
![[Ubuntu] 顯示使用中的 DNS Server 列表](https://caloskao.org/wp-content/uploads/2018/05/Ubuntu_logo_orange.png){kind=logo}
[Ubuntu] 顯示使用中的 DNS Server 列表
顯示使用中的 DNS Server 列表
個人覺得最快也最簡單的方式就是直接 cat /etc/resolv.conf
執行後畫面輸出如下：
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 192.168.1.1
如果有設定多個 DNS Server
則會出現多行 nameserver x.x.x.x
雖然網路上有不少人給的答案是利用 nmcli 去取得
但筆者測試固定 IP 或 DHCP Client 都沒有顯示 IP4.DNS
手邊的系統版本為 16.04.3 LTS (Xenial)
References:
Command-line to list DNS servers used by my system – Ask Ubuntu
networking – What DNS servers am I using? – Unix & Linux Stack Exchange
![[CentOS] 加入第三方套件庫](https://caloskao.org/wp-content/uploads/2018/01/Centos-logo-light.1024px-1013x345.png){kind=logo}
[CentOS] 加入第三方套件庫
如果想要安裝一個套件
不想透過自行編譯或是手動下載 RPM 套件包進行安裝的話
但是系統預設的套件庫又找不到想要安裝的套件時
可以透過加入第三方套件庫來解決這個問題
在 CentOS 官方 WIKI 可以找到一些可信任的第三方套件庫
本文以 Extra Packages for Enterprise Linux (EPEL) 作為範例實作。
[Ubuntu] dpkg: warning: files list file for package * missing; assuming package has no files currently installed
某天在 Ubuntu 上使用 apt-get install 安裝套件時狂噴 warning …
dpkg: warning: files list file for package 'node-lockfile' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libhtml-tagset-perl' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'node-normalize-package-data' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'update-inetd' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'x11proto-dri2-dev' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'node-npmlog' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'liblockfile-bin' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'liblzma5:amd64' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'liblzma5:i386' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'python-gnupginterface' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libhttp-date-perl' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libjs-node-uuid' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'pdksh' missing; assuming package has no files currently installed
# 族繁不及備載...[Git] Unable to find remote helper for ‘https’
當使用 git 以 HTTPS 連線 clone repository 時出現 …
Unable to find remote helper for ‘https’
可能是在安裝 git 時因為缺少 libcurl 套件所導致
但是環境沒有 libcurl 時一樣可以安裝，只是會不能走 HTTPS 通道而已
若要修復這個問題，只需安裝 libcurl 後重新編譯安裝 git 就好：
# 系統為Ubuntu/Debain時，執行以下指令
apt-get install -y libcurl4-openssl-dev
# 系統為CentOS/RedHat/Fedora時，執行以下指令
yum install -y libcurl-devel.x86_64
# 回到 git 原始碼目錄重新編譯並安裝 git
cd ~/git-2.8.16
./configure
make
make installReference: linux – “Unable to find remote helper for ‘https'” during git clone – Stack Overflow