Sed adds content below a line

the requirement is to add new content below a line

CentOS

related codes

sed-I"Nbat / Target text 1Universe a\ / / ancymocknreturn add new content 1" file_path

sed-I"Nbat / Target text 2Universe a\ / / ancymocknreturn add new content 2 "file_path

expected results

Target text 1
/ / ancymock
return new content 1

Target text 2
/ / ancymock
return new content 2

actual results

Target text 1
/ / ancymock
return new content 1

Target text 2
(with a blank line)
/ / ancymock
return new content 2

when the same sed logic is appended to the second target document, a jump line appears. Sometimes I really think rlgl

Sed

Jan.08,2022

$ cat /alidata/abc.txt
abc
My test text

sed -i "$ a\" /alidata/abc.txt

$ cat /alidata/abc.txt
abc
My test text

-sharp cat abc.txt
Some text
Random
[option]
insert text here
Some stuff

-sharp sed '/^Some text/{N;s/$/\nadd new line/}' abc.txt
Some text
Random
add new line
[option]
insert text here

add-I to modify the original file.

Previous: Is it the reason for the php version to crawl https and report an error?

Next: The front end uses get request to do an export download function, how to add request header data?

How to realize the reuse of Vue.js single page application?
requirements: implement the reuse of Vue.js but single-page applications that is to put a single page as a page (module or component) into another Vue.js project through vue-router routing. question: I don t know what the professional name of this...

Component-based vue.js vue.js-multi-page

Feb.28,2021
The Methods method in the Vue component updates the data on how to re-render the component.
in the Vue component, the value in the object returned by Data is modified by the method in Methods, but the whole page is not re-rendered according to the modified value export default { data () { let page = this.$attrs[ page ] let pageSize = this....

Component-based vue.js

Mar.04,2021
After the vue parent component updates the data through the ref call child component method, the view is not updated
after the vue parent component updates the data through the ref call child component method, the view part updates and calling the unified method in the subcomponent mounted () {} can update vue version 2.5.15 parent.vue this.$nextTick(() => {...

Vue.js component-based mvvm front-end javascript

Mar.06,2021
How to realize the componentization of front-end ui without relying on front-end frameworks such as React, Vue and Angular?
< H2 > how to realize the componentization of front-end ui without relying on front-end frameworks such as React, Vue and Angular? < H2 >...

Component-based front-end-engineering javascript

Mar.11,2021
How to control the default display of one of the subcomponents in vue?
router.js { path: index , name: index , component:index, children:[ { path: device user , name: user , component:user, children:[ { path: ...

Component-based router vue.js

Mar.21,2021
How to keep the data Synchronize when multiple components of Vue use the same data?
example: there are resource lists, builds, army lists, and other components in the game, all of which require resource variables. build reduces the number of resource values. How does this change spread to other components? the current solutio...

Component-based vue.js javascript

Mar.22,2021
The shell script modifies the specified block of code in the code file
how to insert a line of code in a specified code block with commands such as sed , awk , and so on. suppose you have a file hello.php , with the following contents: piplin package, modify the app Providers AppServiceProvider.php file, and add...

Shell bash sed awk

Mar.23,2021
Linux which command can intercept the contents of the specified start and end locations of the file?
for example, the file a.bin is a binary file, and the file is very large. I want to intercept 1024-5566 bytes and save it as a file ...

Linux sed

Mar.26,2021
Error using gulp-htmlmin compression in thinkphp framework project
problem description 1. The whole project uses the framework of thinkphp. A few days ago, I encountered the following error when I tried to compress html code with gulp-htmlmin: thinkphp 2.js : : <volist name="list" id="vo&quo...

Html javascript compressed gulp thinkphp

Apr.07,2021
The discrepancy between the class selector name in the compiled style when using css module in vue and the class name in dom causes the style not to take effect.
when using css module, the parent component suffixes the class selector of the child component style with the hash suffix, but the html tag is intact, causing the child component to reference no style effect for example, btn.vue is referenced in he...

Component-based css-modules css vue.js

Apr.29,2021
Should the initialization of the vue component be called within the component or from the parent component?
for example, there is a drop-down box component that needs to initialize its contents. There is an init method inside the component to get the content data. Should be called with $refs.xxx.init () on the parent component, or should the child compon...

Component-based javascript vue.js

Aug.12,2021
The problem of passing values in vue components
topic description when learning the component communication of vue according to the video tutorial, achieve the following effect: Click on the first line of text, all text becomes dell, Click on the second line of text, all text becomes lenov but...

Component-based

Sep.02,2021
Some pages of the vue project need to introduce common headers and other pages at the end of the project.
I have introduced header and tail components into App.vue so that all pages of the project have headers and tails, but I only need some pages to introduce so far....

Component-based vue.js

Sep.06,2021
The sed command must be added with-I?
for example sed 41a Port 22520 etc ssh ssh_config the result file does not change until-I is added. Thank you. I m always confused about this kind of stuff. ...

Sed linux

Dec.30,2021
How do I use JS to get the classname, of DOM in the vue component to ensure that the acquired classname is unique?
the problem is difficult to describe. Let me give an example. For example, the following code is in the header of the page: <template> <div class="header"> ... < div> < template> <script> export default {...

Component-based vue.js javascript

Jan.08,2022
The problem of window.onresize covering each other in vue
I have used window.onresize in the hook functions of both components and found that the later components will overwrite the window.onresize of the previous components. Is there any way to ensure that the window.onresize of all components can not affect e...

Component-based vue.js javascript

Jan.08,2022
How does angular output subcomponents in a component template (to get subcomponent objects)
problem description I now need to control how the child component is displayed. I have obtained the object instance of the child component component, but how do I display this object in the template of the parent component? the environmental backgro...

Component-based angular angular6

Feb.18,2022
How does angular output subcomponents in a component template (to get subcomponent objects)
problem description I now need to control how the child component is displayed. I have obtained the object instance of the child component component, but how do I display this object in the template of the parent component? the environmental backgro...

Component-based angular angular6

Feb.18,2022
How does angular output subcomponents in a component template (to get subcomponent objects)
problem description I now need to control how the child component is displayed. I have obtained the object instance of the child component component, but how do I display this object in the template of the parent component? the environmental backgro...

Component-based angular angular6

Feb.18,2022
Problems with laravel vue components
examples of just getting started using laravel with vue components: follow the tutorial to write the following examples mainly uses three files welcomeComponent.vue, app.js and index.blade.php directory structure as follows welcomeComponent.vue ap...

Laravel vue.js component-based

Apr.20,2022