--- title: BASH/Linux Interview Question for DevOps Engineers description: This post covers various interview questions for DevOps engineers related to BASH and Linux, including types of variables used in shell scripting, checking if... canonical: https://daily.dev/posts/bash-linux-interview-question-for-devops-engineers-5zbg9sbek twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: BASH/Linux Interview Question for DevOps Engineers | daily.dev og:description: This post covers various interview questions for DevOps engineers related to BASH and Linux, including types of variables used in shell scripting, checking if... og:url: https://daily.dev/posts/bash-linux-interview-question-for-devops-engineers-5zbg9sbek og:image: https://api.daily.dev/og/posts/5zBG9SBEk.png og:image:alt: BASH/Linux Interview Question for DevOps Engineers og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # BASH/Linux Interview Question for DevOps Engineers **[Community Picks](https://daily.dev/sources/community)** · 6 min read · 104 upvotes · 4 comments ## Summary This post covers various interview questions for DevOps engineers related to BASH and Linux, including types of variables used in shell scripting, checking if a file exists, default file permissions, CRONTAB, debugging shell scripts, disk usage, shebang line, Linux process stages, metacharacters, renaming files, reading command line arguments, standard streams in Linux, differentiating between two shell variables, checking file existence, extracting part of a string variable, differences in string matching, SSH authentication, special shell variable $?, using grep to find numeric digits, listing file names only, checking if a zip file contains a directory, and when to use curly braces around shell variables. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Community discussion Top comments from developers on daily.dev. **@quasar6** · 3 upvotes > Could be an interesting topic however this article feels very AI generated. It’s just questions and straight up answers without additional insight. Just like a ChatGPT thread. Very disappointing. **@asmundur** · 1 upvotes > Not good content. I found an error in the article with question 16. I'm sure there are more and many of the answers feel like they could be improved upon a lot: > > >[[ $string == “efg*” ]] > checks if string is efg) > > this isn't correct. It checks if the string is 'efg*' > > Question number 17. Isn't a question. Question 14. is a repitition of question number 1. These are just the most obvious issues I saw in the article. I'm sure there are more. --- Tags: [#devops](https://daily.dev/tags/devops), [#linux](https://daily.dev/tags/linux), [#bash](https://daily.dev/tags/bash), [#interview-questions](https://daily.dev/tags/interview-questions) [View this post on daily.dev](https://daily.dev/posts/bash-linux-interview-question-for-devops-engineers-5zbg9sbek) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"BASH/Linux Interview Question for DevOps Engineers","url":"https://daily.dev/posts/bash-linux-interview-question-for-devops-engineers-5zbg9sbek","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/bash-linux-interview-question-for-devops-engineers-5zbg9sbek"},"datePublished":"2024-05-06T06:16:07.767Z","dateModified":"2024-05-09T08:20:02.615Z","description":"This post covers various interview questions for DevOps engineers related to BASH and Linux, including types of variables used in shell scripting, checking if...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/e06167645acc46ddeeeabb2c7cdb407d?_a=AQAEuiZ","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/e06167645acc46ddeeeabb2c7cdb407d?_a=AQAEuiZ","isAccessibleForFree":true,"articleSection":"Community Picks","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Community Picks","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1655817725/logos/community","url":"https://daily.dev/sources/community"},"commentCount":4,"discussionUrl":"https://daily.dev/posts/bash-linux-interview-question-for-devops-engineers-5zbg9sbek","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":104},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":4}],"keywords":"devops,linux,bash,interview-questions","timeRequired":"PT6M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Community Picks","item":"https://daily.dev/sources/community"},{"@type":"ListItem","position":3,"name":"BASH/Linux Interview Question for DevOps Engineers"}]} {"@context":"https://schema.org","@type":"WebPage","@id":"https://daily.dev/posts/bash-linux-interview-question-for-devops-engineers-5zbg9sbek","comment":[{"@type":"Comment","text":"Could be an interesting topic however this article feels very AI generated. It’s just questions and straight up answers without additional insight. Just like a ChatGPT thread. Very disappointing.","datePublished":"2024-05-16T12:16:01.729Z","url":"https://daily.dev/posts/5zBG9SBEk#c-UuEbRHSoM","author":{"@type":"Person","name":"Dániel Szűcs","url":"https://daily.dev/quasar6","image":"https://media.daily.dev/image/upload/s--p5kCI_aU--/f_auto/v1715019351/avatars/avatar_c5ZRP99AUMRu4PZCG0bsf"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":3}},{"@type":"Comment","text":"Not good content. I found an error in the article with question 16. I’m sure there are more and many of the answers feel like they could be improved upon a lot:\n\n[[ $string == “efg*” ]] > checks if string is efg)\n\nthis isn’t correct. It checks if the string is ‘efg*’\nQuestion number 17. Isn’t a question. Question 14. is a repitition of question number 1. These are just the most obvious issues I saw in the article. I’m sure there are more.","datePublished":"2024-05-27T14:12:43.384Z","dateModified":"2024-05-27T21:43:14.896Z","url":"https://daily.dev/posts/5zBG9SBEk#c-Gu892h5Ir","author":{"@type":"Person","name":"Asmundur Gudjonsson","url":"https://daily.dev/asmundur","image":"https://media.daily.dev/image/upload/s--OvFUoEga--/f_auto/v1716570572/avatars/avatar_PeX2HvjmT1erIepSKluaw"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":1}}]} ```