Unix tool tip @UnixToolTip
Tips on Unix utilities and related topics from @JohnDCook. JohnDCook.com Joined August 2011-
Tweets6K
-
Followers84K
-
Following19
-
Likes99
Editing by semantic units johndcook.com/blog/2012/07/2…
Remove duplicate lines: awk '!a[$0]++' from catonmat.net/blog/awk-book/
The day Return became Enter aresluna.org/the-day-return…
Gnu Emacs reference card damtp.cam.ac.uk/user/sje30/ess… [pdf]
The sed command r inserts a file. For example, insert foo.h after 'INCLUDE': sed '/INCLUDE/ r foo.h'
The option -i or --ignore-case tells diff to do a case-insensitive comparison.
List files containing a match for a regular expression: grep -l
The substitute command in sed can take a 'w' option to specify an output file. e.g. sed s/foo/bar/w myfile.
Negative space in operating systems johndcook.com/blog/2008/12/2…
“I use Emacs, which might be thought of as a thermonuclear word processor.” — Neal Stephenson
Awk script to count the number of words in a file: awk '{ total = total + NF }; END { print total+0 }'
wc -L shows the length of the longest line in a file.
wc returns the number of lines, words, and bytes in a file. Can use -l, -w, -c to get just one of these.
Comparing similar operations in sed and awk pement.org/awk/awk_sed.txt
Find is a beautiful tool: eriwen.com/productivity/f…
'The vim learning curve is a myth.' robots.thoughtbot.com/the-vim-learni…
One way to practice sed commands is to pipe echo out. Example: echo 'hello world' | sed s/world/orb/
Linux Handbook @LinuxHandbook
146K Followers 68 Following Learn to use Linux commands, SysAdmin tools, Self-hosting, Docker and other DevOps stuff with us.
It's FOSS @itsfoss2
148K Followers 147 Following Linux and Open Source Web Portal 🐧 Follow us to - Get the latest Linux and Open Source news 📰 - Learn Linux tips and tutorials 💡 - Enjoy Linux memes 🤣
Computer Science @CompSciFact
251K Followers 19 Following Daily tweets about computer science and related stuff @JohnDCook.
Algebra Etc. @AlgebraFact
194K Followers 19 Following Tweets about algebra, number theory, and miscellaneous math by @JohnDCook.
Command Line Magic @climagic
190K Followers 11K Following Cool Unix/Linux Command Line tricks you can use in $TWITTER_CHAR_LIMIT characters or less. Here mostly to inspire. Also on https://t.co/YYJE9JpVnF
Analysis Fact @AnalysisFact
133K Followers 19 Following Daily tweets about real and complex analysis and related topics. From @JohnDCook.
Regular Expression @RegexTip
75K Followers 19 Following Learn to use regular expressions by following RegexTip. From @JohnDCook.
Data Science Fact @DataSciFact
195K Followers 19 Following Daily data science tweets from @JohnDCook.
Scientific Python @SciPyTip
209K Followers 18 Following Tweets about SciPy (Scientific Python) and related topics from @JohnDCook.
Linux Today @linuxtoday
472K Followers 74 Following Linux news and how-to's collected from all over.
Signal Processing @DSP_fact
34K Followers 18 Following Digital signal processing, acoustics, Fourier analysis, etc.
Differential Eqns @diff_eq
75K Followers 17 Following Tweets on ordinary and partial differential equations from @JohnDCook
TeX and Typography @TeXtip
51K Followers 19 Following Tweets on TeX, LaTeX, and typography. @JohnDCook.
Topology Fact @TopologyFact
74K Followers 19 Following Tweets on topology and geometry from @JohnDCook.
FreeBSD Frau @freebsdfrau
10K Followers 790 Following Parent. FreeBSD src committer. Maker of hand tools for woodworking.
Science and Medicine @ScienceTip
42K Followers 19 Following Daily post on science and medicine from @JohnDCook
Raymond Hettinger @raymondh
75K Followers 545 Following Chief trainer for Mutable Minds. Certified Public Accountant, Retired Python guru. Alloy & TLA⁺ enthusiast. Aspiring pianist. Former pilot. Born at 320 ppm CO₂.
PragmaticProgrammers @pragprog
27K Followers 292 Following Technical excellence from a trusted friend and the highest author royalties around. We are pragmatic, and we are developers, for developers.
Otavio Macedo @otavio_c_macedo
80 Followers 116 Following
Abdikani Muhumed @Abdikani83
151 Followers 678 Following Health & Wellness Enthusiast,🥗 Daily Motivation💪 & World History.🌍
delaney @DelaneyDvorsky
4 Followers 48 Following
Lucasmate @Lucasmate116685
4 Followers 156 Following Fixed matches source won bet 289 odds upward here 👇🏻👇🏻
Akorede @Fronzzy07
3 Followers 61 Following
Edward Morawski @dabigmoose1
1 Followers 57 Following
DevOps @TalaqAldhulayi
517 Followers 4K Following Entrepreneur and post-doctoral master's student in Artificial Intelligence and Machine Learning (catchGPT). @talaqalotaibi حسابي 2010
Εραλντο Τσο... @EraldoTs
2 Followers 30 Following
nim iss @srrrrk0
2 Followers 263 Following
Mohammad | Coding �... @DevMohammad_SA
634 Followers 1K Following Python Developer | CS Student | Linux & Open Source Enthusiast
Cuitlahuac @Cuiktlahuac
94 Followers 2K Following
🔻 AbDoc®🔻 @AlKhalduni
138 Followers 759 Following “If you feel pain, you are alive. If you feel someone else’s pain, you are human” (L. N. Tolstoy)
New England Kingdom @England_1616
44 Followers 1K Following
Marco A. Jiménez @marcoajh_
33 Followers 341 Following
Raeed Alharbi @RaeedALharbi
1 Followers 690 Following
letsden @letsdenre
0 Followers 110 Following
hot yt @ZA0EcftJjL6546
218 Followers 2K Following
m2000 @m200010687209
108 Followers 2K Following
yanis @yanis8035124849
17 Followers 134 Following
Bemused @be2amused
6 Followers 141 Following
smile @Smilex_P
224 Followers 5K Following
xtrenk @gutrenk
5 Followers 500 Following
Maryam Wardah @maryamwardah636
5 Followers 161 Following
David Odin @DavidDindinX
584 Followers 478 Following Uniquement là pour parler de JV. Et encore ! Ma culture n'est pas si grande que ça. Les maths m'intéressent aussi.
José Luis Ruiz @pepeluisrr
597 Followers 2K Following Biomedicine. PhD. Omics. FGCZ-ETH/UZH, Swiss Institute of Bioinformatics. New soul in this very strange world, learning a bit 'bout how to give/take...
Gibun Sam @SSam86932
7 Followers 373 Following
kaushal @kaushal527363
17 Followers 295 Following
XDeathBlack @XDeathBlack
84 Followers 134 Following
wonamilatupa @wonamilatupa
1 Followers 34 Following
Sam O'Riil @Semoriil
351 Followers 322 Following Just watching the world on its way to the end. Ukraine, war. Disclaimer: not expert in anything.
Steve Rockarts @AnonTheInvisibl
0 Followers 448 Following
Arun Bhattacharya @Ar8_33
3 Followers 158 Following
Fuzail Ayaz @mdfuzailayaz
7 Followers 273 Following
Juanba Battauz @juamba2004
18 Followers 2K Following
Computer Science @CompSciFact
251K Followers 19 Following Daily tweets about computer science and related stuff @JohnDCook.
Algebra Etc. @AlgebraFact
194K Followers 19 Following Tweets about algebra, number theory, and miscellaneous math by @JohnDCook.
Analysis Fact @AnalysisFact
133K Followers 19 Following Daily tweets about real and complex analysis and related topics. From @JohnDCook.
Regular Expression @RegexTip
75K Followers 19 Following Learn to use regular expressions by following RegexTip. From @JohnDCook.
Data Science Fact @DataSciFact
195K Followers 19 Following Daily data science tweets from @JohnDCook.
Scientific Python @SciPyTip
209K Followers 18 Following Tweets about SciPy (Scientific Python) and related topics from @JohnDCook.
Signal Processing @DSP_fact
34K Followers 18 Following Digital signal processing, acoustics, Fourier analysis, etc.
Differential Eqns @diff_eq
75K Followers 17 Following Tweets on ordinary and partial differential equations from @JohnDCook
TeX and Typography @TeXtip
51K Followers 19 Following Tweets on TeX, LaTeX, and typography. @JohnDCook.
Topology Fact @TopologyFact
74K Followers 19 Following Tweets on topology and geometry from @JohnDCook.
Logic & Applications @LogicPractice
27K Followers 8 Following Logic and applications of logic from @JohnDCook
Science and Medicine @ScienceTip
42K Followers 19 Following Daily post on science and medicine from @JohnDCook
Functor Fact @FunctorFact
26K Followers 6 Following Functional programming and category theory tweets from @JohnDCook
Units @UnitFact
25K Followers 17 Following Units of measurement, constants, dimensional analysis, etc. From @JohnDCook
Medical Vocabulary @MedVocab
52K Followers 19 Following Learn medical vocabulary a little bit at a time. From @JohnDCook.
Network Fact @NetworkFact
47K Followers 19 Following Daily tweets about networks, graph theory, and related topics from @JohnDCookTrends for United States
194 B posts
68,9 B posts
54,4 B posts
66,1 B posts
74,7 B posts
228 B posts
184 B posts
40,8 B posts
55,5 B posts
7.841 posts
5.393 posts
5.323 posts
6.949 posts
24,3 B posts
5.122 posts
3.958 posts
129 B posts
5.863 posts
2.656 posts
4.033 posts
You might like
Computer Science
@CompSciFact
251K Followers
Regular Expression
@RegexTip
75K Followers
Probability Fact
@ProbFact
147K Followers
Algebra Etc.
@AlgebraFact
194K Followers
Data Science Fact
@DataSciFact
195K Followers
Scientific Python
@SciPyTip
209K Followers
Analysis Fact
@AnalysisFact
133K Followers
Ubuntu
@ubuntu
690K Followers
The Linux Foundation
@linuxfoundation
575K Followers
Linux Format
@linuxformat
53K Followers
nixCraft 🐧
@nixcraft
386K Followers
Differential Eqns
@diff_eq
75K Followers
Topology Fact
@TopologyFact
74K Followers
Logic & Applications
@LogicPractice
27K Followers
Red Hat
@RedHat
297K Followers