diff --git a/CHANGELOG.md b/CHANGELOG.md
index fe7e769ef0..09947917d0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 - Checkboxes can now be 'indeterminate' ([#1215](https://github.com/scm-manager/scm-manager/pull/1215))
 
+### Fixed
+- Fixed installation of debian packages on distros without preinstalled `at` ([#1216](https://github.com/scm-manager/scm-manager/issues/1216) and [#1217](https://github.com/scm-manager/scm-manager/pull/1217))
+
 ## [2.1.1] - 2020-06-23
 ### Fixed
 - Wait until recommended java installation is available for deb packages ([#1209](https://github.com/scm-manager/scm-manager/pull/1209))
diff --git a/scm-packaging/deb/src/main/deb/control/postinst b/scm-packaging/deb/src/main/deb/control/postinst
index e662ab460b..0bd5ff952d 100644
--- a/scm-packaging/deb/src/main/deb/control/postinst
+++ b/scm-packaging/deb/src/main/deb/control/postinst
@@ -40,4 +40,4 @@ sudo systemctl enable scm-server
 # we start scm-manager after 5 seconds
 # this is required, because if we install scm-manager with recommend java
 # java is not fully setup if we ran our postint script
-echo "sleep 5; sudo systemctl start scm-server" | at now
+nohup sh -c "sleep 5; systemctl start scm-server" >/dev/null 2>&1 &
diff --git a/scm-packaging/docker/Dockerfile b/scm-packaging/docker/Dockerfile
index da0599d9d9..86081a941d 100644
--- a/scm-packaging/docker/Dockerfile
+++ b/scm-packaging/docker/Dockerfile
@@ -43,7 +43,7 @@ ENV CACHE_DIR=/var/cache/scm/work
 COPY . /
 
 RUN set -x \
- && apk add --no-cache python2 bash \
+ && apk add --no-cache python2 bash ca-certificates \
  && addgroup -S -g 1000 scm \
  && adduser -S -s /bin/false -G scm -h ${SCM_HOME} -D -H -u 1000 scm \
  && mkdir -p ${SCM_HOME} ${CACHE_DIR} \
diff --git a/scm-ui/ui-components/src/remarkCommitLinksParser.test.ts b/scm-ui/ui-components/src/remarkCommitLinksParser.test.ts
index 11ca3b7444..9d54e3539a 100644
--- a/scm-ui/ui-components/src/remarkCommitLinksParser.test.ts
+++ b/scm-ui/ui-components/src/remarkCommitLinksParser.test.ts
@@ -26,16 +26,20 @@ import { regExpPattern } from "./remarkCommitLinksParser";
 
 describe("Remark Commit Links RegEx Tests", () => {
   it("should match simple names", () => {
-    expect("namespace/name@1a5s4w8a".match(regExpPattern)).toBeTruthy();
+    const regExp = new RegExp(regExpPattern, "g");
+    expect("namespace/name@1a5s4w8a".match(regExp)).toBeTruthy();
   });
   it("should match complex names", () => {
-    expect("hitchhiker/heart-of-gold@c7237cb60689046990dc9dc2a388a517adb3e2b2".match(regExpPattern)).toBeTruthy();
+    const regExp = new RegExp(regExpPattern, "g");
+    expect("hitchhiker/heart-of-gold@c7237cb60689046990dc9dc2a388a517adb3e2b2".match(regExp)).toBeTruthy();
   });
   it("should replace match", () => {
-    expect("Prefix namespace/name@42 suffix".replace(regExpPattern, "replaced")).toBe("Prefix replaced suffix");
+    const regExp = new RegExp(regExpPattern, "g");
+    expect("Prefix namespace/name@42 suffix".replace(regExp, "replaced")).toBe("Prefix replaced suffix");
   });
   it("should match groups", () => {
-    const match = regExpPattern.exec("namespace/name@42");
+    const regExp = new RegExp(regExpPattern, "g");
+    const match = regExp.exec("namespace/name@42");
     expect(match).toBeTruthy();
     if (match) {
       expect(match[1]).toBe("namespace");
@@ -44,15 +48,18 @@ describe("Remark Commit Links RegEx Tests", () => {
     }
   });
   it("should match multiple links in text", () => {
+    const regExp = new RegExp(regExpPattern, "g");
     const text = "Prefix hitchhiker/heart-of-gold@42 some text hitchhiker/heart-of-gold@21 suffix";
     const matches = [];
 
-    let match = regExpPattern.exec(text);
+    let match = regExp.exec(text);
     while (match !== null) {
       matches.push(match[0]);
-      match = regExpPattern.exec(text);
+      match = regExp.exec(text);
     }
 
+    console.log(matches)
+
     expect(matches[0]).toBe("hitchhiker/heart-of-gold@42");
     expect(matches[1]).toBe("hitchhiker/heart-of-gold@21");
   });
diff --git a/scm-ui/ui-components/src/remarkCommitLinksParser.ts b/scm-ui/ui-components/src/remarkCommitLinksParser.ts
index 50b8cc8d3b..fa26c793db 100644
--- a/scm-ui/ui-components/src/remarkCommitLinksParser.ts
+++ b/scm-ui/ui-components/src/remarkCommitLinksParser.ts
@@ -31,19 +31,21 @@ import { TFunction } from "i18next";
 const namePartRegex = nameRegex.source.substring(1, nameRegex.source.length - 1);
 
 // Visible for testing
-export const regExpPattern = new RegExp(`(${namePartRegex})\\/(${namePartRegex})@([\\w\\d]+)`, "g");
+export const regExpPattern = `(${namePartRegex})\\/(${namePartRegex})@([\\w\\d]+)`;
 
 function match(value: string): RegExpMatchArray[] {
+  const regExp = new RegExp(regExpPattern, "g");
   const matches = [];
-  let m = regExpPattern.exec(value);
+  let m = regExp.exec(value);
   while (m) {
     matches.push(m);
-    m = regExpPattern.exec(value);
+    m = regExp.exec(value);
   }
   return matches;
 }
 
 export const createTransformer = (t: TFunction): MdastPlugin => {
+
   return (tree: MarkdownAbstractSyntaxTree) => {
     visit(tree, "text", (node: MarkdownAbstractSyntaxTree, index: number, parent: MarkdownAbstractSyntaxTree) => {
       if (parent.type === "link" || !node.value) {