{"id":75250,"date":"2020-03-24T19:42:19","date_gmt":"2020-03-24T17:42:19","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/obsuzhdenie-standartnye-unix-utility-kotorye-malo-kto-ispolzoval-i-ispolzuet-sejchas"},"modified":"2020-03-24T19:42:19","modified_gmt":"2020-03-24T17:42:19","slug":"obsuzhdenie-standartnye-unix-utility-kotorye-malo-kto-ispolzoval-i-ispolzuet-sejchas","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/administrirovanie\/obsuzhdenie-standartnye-unix-utility-kotorye-malo-kto-ispolzoval-i-ispolzuet-sejchas","title":{"rendered":"Discussione: strumenti UNIX standard che pochi hanno utilizzato e utilizzano ora","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Una settimana fa, Douglas McIlroy, sviluppatore della pipeline UNIX e autore del concetto di \"programmazione orientata ai componenti\", <noindex><a rel=\"nofollow\" href=\"https:\/\/minnie.tuhs.org\/pipermail\/tuhs\/2020-March\/020664.html\">raccontato<\/a><\/noindex> ha discusso di programmi UNIX interessanti e insoliti che non hanno preso piede. La pubblicazione ha avviato un'attiva discussione su Hacker News. Abbiamo raccolto le cose pi\u00f9 interessanti e saremo felici se ti unissi alla discussione.<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/1cloud\/blog\/493718\/\"><img decoding=\"async\" alt=\"Discussione: strumenti UNIX standard che pochi hanno utilizzato e utilizzano ora\" src=\"\/wp-content\/uploads\/2020\/03\/718c9fbcd3e2608b4079aa16e0ccf7f7.png\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\n<i>Foto \u2014 <noindex><a rel=\"nofollow\" href=\"https:\/\/unsplash.com\/photos\/QmNnZj_Ok-M\">Virginia Johnson<\/a><\/noindex> \u2014 Unsplash<\/i><\/p>\n<h2>Lavorare con il testo<\/h2>\n<p>\nNei sistemi operativi simili a UNIX c'\u00e8 un set standard di strumenti per la formattazione del testo. L'utilit\u00e0 <b><i>typo<\/i><\/b> consentiva di controllare un documento per errori di battitura e <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/%D0%93%D0%B0%D0%BF%D0%B0%D0%BA%D1%81\">hapaxes<\/a><\/noindex> \u2014 parole che compaiono nel materiale solo una volta. \u00c8 interessante notare che per trovare errori di battitura il programma <noindex><a rel=\"nofollow\" href=\"http:\/\/man.cat-v.org\/unix-6th\/1\/typo\">non utilizza<\/a><\/noindex> dizionari. Si basa esclusivamente sulle informazioni nel file e utilizza un'analisi della frequenza sulle trigrammi (una sequenza di tre caratteri). Tutti i contatori necessari <noindex><a rel=\"nofollow\" href=\"https:\/\/minnie.tuhs.org\/pipermail\/tuhs\/2020-March\/020664.html\">sono memorizzati<\/a><\/noindex> in un array 26x26x26. Secondo Douglas McIlroy, tale quantit\u00e0 di memoria era appena sufficiente per alcuni contatori a byte singolo. Pertanto, per risparmiare spazio, venivano scritti in forma logaritmica.<\/p>\n<p>Oggi typo \u00e8 stato sostituito da programmi di controllo ortografico pi\u00f9 moderni e precisi basati su dizionari. Tuttavia, lo strumento \u00e8 ancora ricordato: alcuni anni fa, un appassionato <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/robpike\/typo\">ha presentato<\/a><\/noindex> ha implementato typo in Go. Il repository \u00e8 ancora aggiornato.<\/p>\n<p>Un altro strumento per lavorare con documenti degli anni '80 \u00e8 il pacchetto <b><i>Writer's Workbench<\/i><\/b> di Lorinda Cherry e Nina McDonald di Bell Labs. Includeva <noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/Writer%27s_Workbench#Package_contents\">strumenti per identificare le parti del discorso e lo stile del documento, per cercare tautologie e frasi eccessivamente complesse. Le utilit\u00e0 sono state sviluppate come supporto per gli studenti, e per un certo periodo i<\/a><\/noindex> studenti dell'Universit\u00e0 statale del Colorado negli Stati Uniti. Ma all'inizio degli anni '90, Writer\u2019s Workbench \u00e8 stato dimenticato, poich\u00e9 non era incluso nella Version 7 di Unix. Tuttavia, questo strumento ha continuato la sua strada tramite emuli, come ad esempio <noindex><a rel=\"nofollow\" href=\"https:\/\/bit.ly\/2U9mSjT\">sono stati utilizzati<\/a><\/noindex> studenti dell'Universit\u00e0 del Colorado negli Stati Uniti. Tuttavia, all'inizio degli anni '90, Writer's Workbench era caduto nell'oblio, poich\u00e9 non era incluso nella Version 7 Unix. Tuttavia, questo strumento ha continuato il suo percorso sotto forma di imitatori, come ad esempio, <noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/Grammatik\">per IBM PC.<\/a><\/noindex> In UNIX ci sono anche strumenti standard che semplificano il lavoro con le formule. Esiste un preprocessore per la formattazione delle espressioni matematiche<\/p>\n<p>. \u00c8 notevole perch\u00e9 per visualizzare una formula il programmista deve semplicemente descriverla usando parole e simboli semplici. Le parole chiave consentono di spostare i segni matematici in verticale e orizzontale, cambiare le loro dimensioni e altri parametri. Se si invia all'utilit\u00e0 la stringa: <b><i>eqn<\/i><\/b>sum from { k = 1 } to N { k sup 2 }<\/p>\n<pre><code class=\"bash\">Il risultato generato sar\u00e0 la seguente formula:<\/code><\/pre>\n<p>\nNegli anni '80 e '90 eqn<\/p>\n<p><img decoding=\"async\" alt=\"Discussione: strumenti UNIX standard che pochi hanno utilizzato e utilizzano ora\" src=\"\/wp-content\/uploads\/2020\/03\/afa0c33387f077ea8540be7961dd741d.png\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>\nha aiutato <noindex><a rel=\"nofollow\" href=\"https:\/\/news.ycombinator.com\/item?id=22582548\">i professionisti IT a scrivere manuali per il software. Ma in seguito \u00e8 stato sostituito dal sistema LaTeX, che<\/a><\/noindex> \u00e8 anche presente su Habr. Ma eqn \u00e8 il primo strumento di questa classe a rimanere parte dei sistemi operativi simili a UNIX. <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/docs\/help\/posts\/#allowed_tags_formulae\">utilizza<\/a><\/noindex> Nel thread tematico, i residenti di Hacker News hanno segnalato alcune utilit\u00e0 raramente usate per lavorare con i file. Una di queste<\/p>\n<h2>Lavorare con i file<\/h2>\n<p>\nera <noindex><a rel=\"nofollow\" href=\"https:\/\/news.ycombinator.com\/item?id=22583046\">comm<\/a><\/noindex> <b><i>per il confronto. Questo \u00e8 un'analisi semplificata di<\/i><\/b> , progettata per funzionare in script. \u00c8 stato scritto <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/Diff\">diff<\/a><\/noindex>dallo stesso Richard Stallman insieme a David MacKenzie. <noindex><a rel=\"nofollow\" href=\"https:\/\/linux.die.net\/man\/1\/comm\">scritto<\/a><\/noindex> L'output del programma consiste in tre colonne. La prima colonna contiene valori unici per il primo file, la seconda \u2014 unici per il secondo file. La terza colonna include valori comuni. Per funzionare correttamente, i documenti confrontati devono essere ordinati lessicalmente. Pertanto, uno dei residenti del sito<\/p>\n<p>ha suggerito di usare l'utilit\u00e0 nel seguente modo: <noindex><a rel=\"nofollow\" href=\"https:\/\/news.ycombinator.com\/item?id=22583686\">ha proposto<\/a><\/noindex> comm &lt;(sort fileA.txt) &lt;(sort fileB.txt)<\/p>\n<pre><code class=\"bash\">Comm \u00e8 comodo da usare per controllare l'ortografia delle parole. Basta confrontarle con un documento di riferimento dizionario. Considerando le complessit\u00e0 legate alla necessit\u00e0 di ordinare i file, \u00e8 chiaro<\/code><\/pre>\n<p>\n, che Stallman e MacKenzie hanno scritto la loro utilit\u00e0 esclusivamente per questo caso d'uso. <noindex><a rel=\"nofollow\" href=\"https:\/\/web.archive.org\/web\/20090402013730\/http:\/apicom.org.ua\/blog\/2009\/02\/16\/komanda-comm\/\">opinioni<\/a><\/noindex>Marnix Hogendoorn<\/p>\n<p><img decoding=\"async\" alt=\"Discussione: strumenti UNIX standard che pochi hanno utilizzato e utilizzano ora\" src=\"\/wp-content\/uploads\/2020\/03\/ad90deb64ab4fd2215cd0c47299102eb.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Foto \u2014 <noindex><a rel=\"nofollow\" href=\"https:\/\/unsplash.com\/photos\/VB1XqDcp6sc\">\u00c8 stato inoltre un partecipante alla discussione su HN<\/a><\/noindex> \u2014 Unsplash<\/i><\/p>\n<p>le possibilit\u00e0 dell'operatore <noindex><a rel=\"nofollow\" href=\"https:\/\/news.ycombinator.com\/item?id=22583803\">ha sottolineato<\/a><\/noindex> paste <i><b>, che per lui non erano evidenti. Permette di alternare flussi di dati o di suddividere un flusso in due colonne durante l'output:<\/b><\/i>$ paste &lt;( echo -e &#039;foonbar&#039; ) &lt;( echo -e &#039;baznqux&#039; )\nfoo     baz\nbar     qux\n$ echo -e &#039;foonbarnbaznqux&#039; | paste - -\nfoo     bar\nbaz     qux<\/p>\n<pre><code class=\"bash\">, che spesso per eseguire queste semplici operazioni si utilizzano soluzioni non ottimali: a partire da\n<\/code><\/pre>\n<p>\nUno degli utenti <noindex><a rel=\"nofollow\" href=\"https:\/\/news.ycombinator.com\/item?id=22585103\">ha notato.<\/a><\/noindex>fmt <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/Fmt\">ex<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/Ex_(Unix)\">e finendo con<\/a><\/noindex> mlr <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/johnkerl\/miller\">jot<\/a><\/noindex> con <noindex><a rel=\"nofollow\" href=\"http:\/\/www.nsc.ru\/cgi-bin\/www\/unix_help\/unix-man?jot\">rs<\/a><\/noindex> e <noindex><a rel=\"nofollow\" href=\"https:\/\/www.freebsd.org\/cgi\/man.cgi?query=rs&amp;sektion=1&amp;apropos=0&amp;manpath=freebsd\">Quali capacit\u00e0 standard dei sistemi operativi simili a UNIX sono state una scoperta per te?<\/a><\/noindex>.<\/p>\n<p><i>Come si \u00e8 sviluppato il sistema dei nomi a dominio: l'era ARPANET<\/i><\/p>\n<blockquote><p><b>Di cosa parliamo nel nostro blog aziendale:<\/b><\/p>\n<p><img decoding=\"async\" alt=\"Discussione: strumenti UNIX standard che pochi hanno utilizzato e utilizzano ora\" src=\"\/wp-content\/uploads\/2020\/03\/db0656feed61e91b940671b37ab5f985.png\" style=\"display:block;margin: 0 auto;\" \/> <noindex><a rel=\"nofollow\" href=\"https:\/\/1cloud.ru\/blog\/era-arpanet?utm_source=habrahabr&amp;utm_medium=cpm&amp;utm_campaign=unixtools&amp;utm_content=blog\">Storia del DNS: quando i nomi a dominio sono diventati a pagamento<\/a><\/noindex><br \/>\n<img decoding=\"async\" alt=\"Discussione: strumenti UNIX standard che pochi hanno utilizzato e utilizzano ora\" src=\"\/wp-content\/uploads\/2020\/03\/63e6e0e03ebc4a3e19021bc3b0d2056b.png\" style=\"display:block;margin: 0 auto;\" \/> <noindex><a rel=\"nofollow\" href=\"https:\/\/1cloud.ru\/blog\/pervie-dns-serveri?utm_source=habrahabr&amp;utm_medium=cpm&amp;utm_campaign=unixtools&amp;utm_content=blog\">Storia del sistema dei nomi di dominio: i primi server DNS<\/a><\/noindex><br \/>\n<img decoding=\"async\" alt=\"Discussione: strumenti UNIX standard che pochi hanno utilizzato e utilizzano ora\" src=\"\/wp-content\/uploads\/2020\/03\/b6f82ebfbd4f15956665983a173f3918.png\" style=\"display:block;margin: 0 auto;\" \/> <noindex><a rel=\"nofollow\" href=\"https:\/\/1cloud.ru\/blog\/platnie-dns-imena?utm_source=habrahabr&amp;utm_medium=cpm&amp;utm_campaign=unixtools&amp;utm_content=blog\">Storia del sistema dei nomi a dominio: le \"guerre\" dei protocolli<\/a><\/noindex><br \/>\n<img decoding=\"async\" alt=\"Discussione: strumenti UNIX standard che pochi hanno utilizzato e utilizzano ora\" src=\"\/wp-content\/uploads\/2020\/03\/a275e20583822938ec87cf580228dce6.png\" style=\"display:block;margin: 0 auto;\" \/> <noindex><a rel=\"nofollow\" href=\"https:\/\/1cloud.ru\/blog\/voini-protokolov-dns?utm_source=habrahabr&amp;utm_medium=cpm&amp;utm_campaign=unixtools&amp;utm_content=blog\">Storia del sistema dei nomi di dominio: le \"guerre\" dei protocolli<\/a><\/noindex><\/p><\/blockquote>\n<p>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/1cloud\/blog\/493718\/\">habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041d\u0435\u0434\u0435\u043b\u044e \u043d\u0430\u0437\u0430\u0434 \u0414\u0443\u0433\u043b\u0430\u0441 \u041c\u0430\u043a\u0438\u043b\u0440\u043e\u0439 (Douglas McIlroy), \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a \u043a\u043e\u043d\u0432\u0435\u0439\u0435\u0440\u0430 UNIX \u0438 \u0430\u0432\u0442\u043e\u0440 \u043f\u043e\u043d\u044f\u0442\u0438\u044f \u00ab\u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u043d\u043e-\u043e\u0440\u0438\u0435\u043d\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0435 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435\u00bb, \u0440\u0430\u0441\u0441\u043a\u0430\u0437\u0430\u043b \u043e\u0431 \u0438\u043d\u0442\u0435\u0440\u0435\u0441\u043d\u044b\u0445 \u0438 \u043d\u0435\u043e\u0431\u044b\u0447\u043d\u044b\u0445 UNIX-\u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0430\u0445, \u043d\u0435 \u043d\u0430\u0448\u0435\u0434\u0448\u0438\u0445 \u0448\u0438\u0440\u043e\u043a\u043e\u0433\u043e \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u044f. \u041f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u044f \u0437\u0430\u043f\u0443\u0441\u0442\u0438\u043b\u0430 \u0430\u043a\u0442\u0438\u0432\u043d\u043e\u0435 \u043e\u0431\u0441\u0443\u0436\u0434\u0435\u043d\u0438\u0435 \u043d\u0430 Hacker News. \u041c\u044b \u0441\u043e\u0431\u0440\u0430\u043b\u0438 \u0441\u0430\u043c\u043e\u0435 \u0438\u043d\u0442\u0435\u0440\u0435\u0441\u043d\u043e\u0435 \u0438 \u0431\u0443\u0434\u0435\u043c \u0440\u0430\u0434\u044b, \u0435\u0441\u043b\u0438 \u0432\u044b \u043f\u0440\u0438\u0441\u043e\u0435\u0434\u0438\u043d\u0438\u0442\u0435\u0441\u044c \u043a \u0434\u0438\u0441\u043a\u0443\u0441\u0441\u0438\u0438. \u0424\u043e\u0442\u043e \u2014 Virginia Johnson \u2014 Unsplash \u0420\u0430\u0431\u043e\u0442\u0430 \u0441 \u0442\u0435\u043a\u0441\u0442\u043e\u043c \u0412 UNIX-\u043f\u043e\u0434\u043e\u0431\u043d\u044b\u0445 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u044b\u0445 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":75251,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-75250","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041d\u0435\u0434\u0435\u043b\u044e \u043d\u0430\u0437\u0430\u0434 \u0414\u0443\u0433\u043b\u0430\u0441 \u041c\u0430\u043a\u0438\u043b\u0440\u043e\u0439 (Douglas McIlroy), \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a \u043a\u043e\u043d\u0432\u0435\u0439\u0435\u0440\u0430 UNIX \u0438 \u0430\u0432\u0442\u043e\u0440 \u043f\u043e\u043d\u044f\u0442\u0438\u044f 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La pubblicazione ha avviato un attivo dibattito su Hacker News. Abbiamo raccolto i punti pi\u00f9 interessanti e saremo felici se vi unirete alla discussione. 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