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Posted by Anonymous on Thu 29th Jan 2015 01:52
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  1. http://pof.kpaste.net/
  2.  
  3. [ Monitoring tools ]
  4. ## Network monitoring
  5. # Pretty Ping!
  6. http://www.reddit.com/r/linux/comments/1op98a/prettypingsh_a_better_ui_for_watching_ping/
  7. # Other
  8. https://www.reddit.com/r/linux/comments/2s1q28/useful_commandline_network_monitors_on_linux/
  9.  
  10. # Logcheck, be lazy with checking logs
  11. http://logcheck.org/
  12. https://www.youtube.com/watch?v=1QgbnK45IRg&feature=player_detailpage&list=PL170C8C4DDB2961B2&t=2999
  13. https://www.reddit.com/r/homelab/comments/2fgt30/monitoring_logs_with_elk_logstash_kibana/
  14.  
  15.  
  16. ## Process mgmt
  17. # How to run a process on a specific core
  18. http://xmodulo.com/2013/10/run-program-process-specific-cpu-cores-linux.html
  19. # How to kill process
  20. http://www.cyberciti.biz/faq/kill-process-in-linux-or-terminate-a-process-in-unix-or-linux-systems/
  21.  
  22. # How to roll out your own Debian distro
  23. http://www.staldal.nu/tech/2011/12/11/how-to-roll-your-own-debian-based-linux-distro/
  24.  
  25. # Run stuff collaboratively on a server.
  26. http://www.reddit.com/r/sysadmin/comments/tqo7b/til_rundeck_is_a_great_tool_to_run_commands/
  27.  
  28. # Generate random strings
  29. http://www.howtogeek.com/howto/30184/10-ways-to-generate-a-random-password-from-the-command-line/
  30.  
  31. # twander file manager
  32. http://www.reddit.com/r/linux/comments/1ydl8t/pcman_file_manager_120_gets_separated_desktop/cfjuw9u
  33.  
  34. # Why u no open hardware :(
  35. http://www.reddit.com/r/linux/comments/20zg0h/first_ubuntu_tablets_to_launch_this_autumn/cg86z25
  36.  
  37. # About docs
  38. http://www.reddit.com/r/linux/comments/24jzyg/well_thats_a_super_helpful_installation_error/ch887pw
  39.  
  40. # Pipe through Internet!
  41. http://www.reddit.com/r/linux/comments/24uyqo/til_you_can_pipe_through_internet/
  42.  
  43. # Persistent (full?) install linux on usb for multiple computers with little to no damage? (self.linux)
  44. http://www.reddit.com/r/linux/comments/2gqovx/persistent_full_install_linux_on_usb_for_multiple/
  45.  
  46. # 3D filesystem browser
  47. https://www.reddit.com/r/linux/comments/2hky9x/tdfsb_3d_filesystem_browser/
  48.  
  49. # IPcalc
  50. http://jodies.de/ipcalc
  51.  
  52. # Photoshop on Linux
  53. https://www.reddit.com/r/linux/comments/2nbe8y/it_can_be_done_photoshop_cs5_on_linux_with_wine/
  54.  
  55. # Data recovery
  56. https://www.reddit.com/r/linux/comments/2ov9tu/safecopy_recover_data_from_corrupt_media/
  57.  
  58.  
  59.  
  60.  
  61. [[[ General resources & Blogs ]]]
  62.  
  63. http://www.reddit.com/r/linux/comments/21rm3o/what_is_a_useful_linux_tool_that_you_use_that/
  64. http://www.reddit.com/r/linux4noobs/comments/2ao9tp/want_to_learn_to_be_a_linux_sysadmin/
  65.  
  66. http://inconsolation.wordpress.com/index/
  67. http://www.catonmat.net/blog/bash-one-liners-explained-part-one/
  68. http://mindspill.net/computing/linux-notes/
  69. http://conqueringthecommandline.com/
  70. http://n0where.net/open-source-sysadmin-resources/
  71. https://help.ubuntu.com/community/Servers
  72.  
  73. # installgentoo
  74. https://wiki.installgentoo.com/index.php?title=Main_Page
  75.  
  76. # About filesystem
  77. http://www.reddit.com/r/linux/comments/1ypoz8/take_the_linux_filesystem_tour/
  78.  
  79. # Hardlinks & Softlinks
  80. http://www.reddit.com/r/linux/comments/251mb8/the_difference_between_hard_and_soft_links/
  81.  
  82. # X11 / Xorg / graphics stack explained
  83. http://www.reddit.com/r/linux/comments/2acvmo/explaining_x11_for_the_rest_of_us/
  84. http://www.reddit.com/r/linux/comments/2b8ap8/heartwrenching_story_of_opengl/
  85. http://www.reddit.com/r/linux/comments/1twuhi/xplain_explaining_x11_for_the_rest_of_us_jasper/
  86.  
  87. # (Illustrated) SSH
  88. http://chamibuddhika.wordpress.com/2012/03/21/ssh-tunnelling-explained/
  89. http://www.unixwiz.net/techtips/ssh-agent-forwarding.html
  90. https://www.reddit.com/r/linux/comments/2iflp3/prefixed_multihop_ssh_wildcard_configurations/
  91. https://www.reddit.com/r/linux/comments/2r539r/why_arent_we_using_ssh_for_everything/
  92.  
  93. # The Fascinating World of Linux System Calls (sysdigcloud.com)
  94. https://www.reddit.com/r/linux/comments/2pm6lo/the_fascinating_world_of_linux_system_calls/
  95.  
  96. # systemd for Administrators, Part 1
  97. http://0pointer.de/blog/projects/systemd-for-admins-1.html
  98. # systemd for users
  99. http://www.reddit.com/r/linux/comments/2dvmdn/what_do_you_as_a_user_love_about_systemd/
  100.  
  101. # Rsync difference between --checksum and --ignore-times options
  102. http://serverfault.com/questions/211005/rsync-difference-between-checksum-and-ignore-times-options
  103.  
  104. # wget useful commands
  105. https://www.reddit.com/r/opendirectories/comments/2rfg79/20_wget_commands_that_can_be_used_to_accomplish/
  106.  
  107. # Rute User's Tutorial and Exposition
  108. http://rute.2038bug.com/index.html.gz
  109.  
  110. # Explains commands and their flags. VERY USEFUL!
  111. http://explainshell.com/
  112.  
  113. # IBM developer works
  114. http://www.ibm.com/developerworks/linux/
  115.  
  116. # Debian minimal
  117. http://linuxforcynics.com/how-to/minimal-debian-install
  118. http://ask.debian.net/questions/what-s-the-first-thing-you-do-after-you-install-debian
  119.  
  120. # BroPages
  121. http://bropages.org/browse
  122.  
  123. # Cron syntax in plain English
  124. http://cronchecker.net/
  125.  
  126. # Install WordPress on CentOS 6.x
  127. http://www.geekpeek.net/install-wordpress-on-centos/
  128. http://www.tecmint.com/install-wordpress-using-lamp-or-lemp-on-rhel-centos-fedora/
  129.  
  130.  
  131. [ Basic sec ]
  132. # Linux 2FA
  133. http://www.reddit.com/r/linux/comments/2b4u4n/2_factor_authentication_backup_2fa_software_for/
  134. # OTP (GAuth) @ CLI
  135. http://otp.readthedocs.org/en/latest/
  136.  
  137. # LUKS data encryption
  138. http://www.reddit.com/r/linux/comments/2bgnwp/encrypt_your_data_using_luks/
  139.  
  140. # iptables
  141. https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Security_Guide/sect-Security_Guide-IPTables.html
  142. http://www.linuxtopia.org/online_books/centos_linux_guides/centos_linux_security_guide/s1-fireall-ipt-act.html
  143. http://www.cyberciti.biz/faq/rhel-fedorta-linux-iptables-firewall-configuration-tutorial/
  144. http://diaryproducts.net/about/operating_systems/unix/nmap_port_scanner_iptables_firewall
  145.  
  146.  
  147. # GRUB
  148. http://ubuntuforums.org/showthread.php?t=1195275
  149. http://www.reddit.com/r/linux4noobs/comments/2ex4ex/short_introduction_into_grub_internals/
  150.  
  151. # Visualize memory
  152. https://www.reddit.com/r/linux/comments/2mrrjb/how_to_visualize_memory_usage_on_linux/
  153.  
  154. # inotify (trigger)
  155. https://www.reddit.com/r/commandline/comments/2runmh/how_you_can_use_inotifytools_to_monitor_file/
  156.  
  157.  
  158. [ Nginx ]
  159. # docs
  160. https://github.com/ngx/docs
  161. http://wiki.nginx.org/Main
  162.  
  163. # Optimizing nginx
  164. http://blog.zachorr.com/nginx-setup/
  165.  
  166. # How to redirect nginx
  167. http://www.servernoobs.com/nginx-redirect-url-with-http1-1-301-moved-permanently-header/?doing_wp_cron=1393287314.0689818859100341796875
  168.  
  169. # Hardening nginx with better cyphers
  170. https://www.reddit.com/r/netsec/comments/2pqsx9/harden_ssl_in_nginx_with_stronger_ciphers_newer/
  171.  
  172.  
  173. [ Docker ]
  174. http://www.reddit.com/r/linux/comments/2bxxye/introduction_to_docker/
  175. http://www.reddit.com/r/linux/comments/2c1csz/whos_using_docker/
  176. http://www.reddit.com/r/linux/comments/2bedwv/docker_security_with_selinux/
  177. https://github.com/shofetim/docker-skype
  178.  
  179.  
  180. [ Namespaces ]
  181. https://www.reddit.com/r/linux/comments/2n7mol/linux_namespaces_powerful_isolation_os_level/
  182. https://www.reddit.com/r/linux/comments/2n17b7/a_guide_to_linux_namespaces_and_environment/
  183. # cgroups
  184. http://lwn.net/Articles/603762/
  185.  
  186.  
  187. [ tmux ]
  188. http://www.reddit.com/r/linux/comments/2arczq/learn_tmux_with_minimul/
  189. http://www.reddit.com/r/commandline/comments/240oyo/mucks_a_session_manager_for_gnu_screen_and_tmux/
  190. http://www.reddit.com/r/commandline/comments/25tcfk/practical_tmux/
  191.  
  192. # Memory leak improvement under Linux - http://tmux.kpaste.net/ee9c3
  193.  
  194.  
  195. [ LOL / regex ]
  196. http://www.bbc.co.uk/news/world-europe-12985082
  197. http://stackoverflow.com/questions/1732348/regex-match-open-tags-except-xhtml-self-contained-tags/1732454
  198.  
  199. # Validating e-mail addresses, easy way, and the hard way.
  200. http://blog.mattheworiordan.com/post/13174566389/url-regular-expression-for-links-with-or-without-the
  201. http://www.ex-parrot.com/pdw/Mail-RFC822-Address.html
  202.  
  203. # Intro to regex
  204. http://www.youtube.com/watch?v=EkluES9Rvak
  205.  
  206. # Awk primer
  207. https://www.reddit.com/r/commandline/comments/2smkhm/awk_in_20_minutes/
  208. http://www.reddit.com/r/linux/comments/29hskb/an_awk_primer_wikibooks_open_books_for_an_open/
  209.  
  210.  
  211. [ LaTeX ]
  212. www.latextemplates.com
  213. https://www.writelatex.com/
  214. http://www.reddit.com/r/linux/comments/2clx22/learning_latex_on_linux/
  215.  
  216.  
  217. [ YouTube chans ]
  218. https://www.youtube.com/channel/UCbNxlZZVmfP8n84ag-rGpMg/videos
  219. https://www.youtube.com/user/theurbanpenguin/videos?view=1&flow=list
  220. https://www.youtube.com/user/sabiddle/videos
  221. # scripting
  222. http://www.youtube.com/playlist?list=PLcUid3OP_4OXOUqYTDGjq-iEwtBf-3l2E
  223.  
  224.  
  225. [[[ ~ Audio ~ ]]]
  226.  
  227. http://www.reddit.com/r/linux/comments/1nun4f/using_linux_to_make_music_whats_the_deal/
  228. https://www.reddit.com/r/linux/comments/2iwd2y/is_linux_suitable_for_audio_recordingproduction/
  229. https://wiki.archlinux.org/index.php/Pro_Audio
  230. http://alsa.opensrc.org/
  231.  
  232. http://tuxradar.com/content/how-it-works-linux-audio-explained
  233. http://stackoverflow.com/questions/20118941/linux-audio-sub-systems
  234. http://0pointer.de/blog/projects/guide-to-sound-apis.html
  235.  
  236. https://forum.ableton.com/viewtopic.php?f=4&t=187391
  237.  
  238. https://github.com/wedesoft/hornetseye-alsa
  239. https://github.com/torvalds/linux/tree/master/Documentation/sound/alsa
  240.  
  241. http://manual.ardour.org/synchronization/latency-and-latency-compensation/
  242.  
  243. # General Reddit threads
  244. http://www.reddit.com/r/linux/comments/236a5l/can_someone_make_something_akin_to_wayland_but/
  245. https://www.reddit.com/r/linux/comments/2sutds/my_band_pneumonia_recorded_our_first_album_using/
  246.  
  247. # Dynamic Range Compression for PulseAudio
  248. https://www.bfccomputing.com/dynamic-range-compression-for-pulseaudio/
  249.  
  250. # ALSA / Pulseaudio for pro audio discussion
  251. https://www.reddit.com/r/linux/comments/2hv73a/what_is_the_one_thing_you_wish_linux_had_natively/ckwd9mk
  252.  
  253. # Config
  254. http://wiki.linuxaudio.org/wiki/system%20configuration#build_your_own_real-time_kernel_on_debian_wheezy_or_later
  255. http://www.penguinproducer.com/Blog/2011/12/setting-up-a-studio-with-ubuntu/
  256.  
  257. # RIP CDs
  258. https://www.reddit.com/r/linux/comments/2ijhdj/gnu_ddrescue_119_released/cl2pofg
  259.  
  260. # Speech / Voice recognition
  261. http://grasch.net/node/22
  262. https://www.reddit.com/r/linux/comments/2jhzle/the_state_of_voice_recognition_software_within/https://www.reddit.com/r/linux/comments/2jhzle/the_state_of_voice_recognition_software_within/
  263.  
  264. # Learn piano
  265. http://pianobooster.sourceforge.net/
  266.  
  267. # The power of (GC)C
  268. echo "main(i){for(i=0;;i++)putchar(((i*(i>>17|i>>9)&46&i>>3))^(i&i>>10|i>>100));}" | gcc -w -x c - && ./a.out | aplay
  269.  
  270. # Troubleshooting
  271. lsusb / lspci
  272. cat /proc/asound/cards
  273. aplay -l
  274. aplay-L
  275.  
  276.  
  277.  
  278. [[[ Alternative UI ]]]
  279.  
  280. # Dex UI - Futuristic/Sci-Fi Interface Programmed In openFrameworks (nnkd.org)
  281. https://www.reddit.com/r/linux/comments/2t0vjv/dex_ui_futuristicscifi_interface_programmed_in/
  282.  
  283. # Eagle Mode - Zoomable User Interface (YouTube)
  284. https://www.reddit.com/r/linux/comments/1nprrh/eagle_mode_zoomable_user_interface_youtube/
  285.  
  286. # Wayland 3D Compositor on Oculus Rift (youtube.com)
  287. https://www.reddit.com/r/linux/comments/287nup/wayland_3d_compositor_on_oculus_rift/
  288.  
  289.  
  290.  
  291. [[[ GAEMZ ]]]
  292. # TribesNext (Tribes2 re-implementation) under Linux
  293. http://www.tribesnext.com/forum/index.php?topic=2095.0
  294. http://www.youtube.com/watch?v=fdyxo_tauNQ
  295.  
  296. # RetroRig
  297. http://www.reddit.com/r/LinuxActionShow/comments/25wndc/retrorig_a_personal_project_i_hope_everyone/
  298.  
  299.  
  300.  
  301. [[[ Damage ]]]
  302.  
  303. [ Prevent ]
  304. # Backup ideas
  305. https://www.reddit.com/r/linux/comments/2qtyby/what_does_rlinux_use_to_backup_their_computers/
  306.  
  307. # How to shred recursively in directories
  308. http://www.linuxforums.org/forum/miscellaneous/46693-how-shred-entire-directory-tree.html#post257616
  309.  
  310. # What to do when altering remote machines
  311. http://www.reddit.com/r/linux/comments/1kdf37/what_are_some_of_your_major_linux_fk_ups/cbnzb11
  312.  
  313. [ Control ]
  314. http://serverfault.com/questions/218005/how-do-i-deal-with-a-compromised-server
  315.  
  316.  
  317.  
  318. [[[ Shell & Scripting ]]]
  319. http://www.howtogeek.com/howto/ubuntu/keyboard-shortcuts-for-bash-command-shell-for-ubuntu-debian-suse-redhat-linux-etc/
  320. http://www.reddit.com/r/linux/comments/2foinb/what_is_the_exact_difference_between_a_terminal_a/
  321. http://mywiki.wooledge.org/
  322. http://wiki.bash-hackers.org/doku.php
  323. http://www.gnu.org/software/bash/manual/bashref.html#Introduction
  324. http://www.reddit.com/r/linux/comments/235v51/better_bash_scripting_in_15_minutes/
  325. http://guide.bash.academy/
  326. http://tldp.org/HOWTO/Bash-Prog-Intro-HOWTO.html
  327.  
  328. # About terminals
  329. http://linuxgazette.net/137/anonymous.html
  330.  
  331. # Customization
  332. http://pln.jonas.me/xterm-colors
  333. http://www.reddit.com/r/commandline/comments/23c4us/the_bash_prompt/
  334. https://www.reddit.com/r/linux/comments/2iytrs/terminalsexy_terminal_color_scheme_designer/
  335.  
  336. # Bash search suggest box
  337. http://www.reddit.com/r/linux/comments/2a4b80/bash_history_suggest_box/
  338.  
  339. # Moar advice
  340. http://www.reddit.com/r/linux/comments/2dwe4y/dae_have_a_bash_script_template_you_generally/
  341.  
  342. # Bash vs. Zsh
  343. http://www.reddit.com/r/linux/comments/2fubpn/zsh_proscons/
  344.  
  345. # How does the Shellshock exploit work?
  346. http://fedoramagazine.org/shellshock-how-does-it-actually-work/
  347. https://www.reddit.com/r/linux/comments/2hlwwz/stackexchanges_top_answer_on_shellshock_and_why/
  348.  
  349. # Fav minimalist CLI apps
  350. https://www.reddit.com/r/linux/comments/2psson/whatre_your_favorite_cli_and_minimalistic/
  351. # Fav aliases
  352. https://www.reddit.com/r/commandline/comments/2tjqz2/favorite_aliases/
  353.  
  354.  
  355. [ VIM ]
  356. # Learn
  357. https://raw.github.com/dahu/LearnVim/master/doc/learnvim.txt
  358. http://dahu.github.io/vim_waz_ere/
  359. https://github.com/dahu/VimRegexTutor
  360. http://www.youtube.com/user/MinuteVimTricks/videos
  361. http://www.reddit.com/r/linux/comments/264hl2/learn_to_love_vim/
  362. http://www.reddit.com/r/linux/comments/29by6c/so_i_now_want_to_learn_vim_and_use_it_as_python/
  363.  
  364. http://pascalprecht.github.io/2014/03/18/why-i-use-vim/
  365. http://of-vim-and-vigor.blogspot.de/2012/06/art-of-edits-i-weaponry.html
  366. http://www.reddit.com/r/linux/comments/1kdvq5/til_that_vim_has_tabs_thats_wonderful/
  367. http://stackoverflow.com/questions/1218390/what-is-your-most-productive-shortcut-with-vim
  368. http://stackoverflow.com/questions/11489428/how-to-make-vim-paste-from-and-copy-to-systems-clipboard
  369.  
  370. # Compiled resource
  371. vim.kpaste.net
  372.  
  373. http://vimcasts.org/
  374.  
  375. # book
  376. http://pragprog.com/book/dnvim/practical-vim
  377.  
  378. # counter-argument
  379. http://www.reddit.com/submit?url=http%3A%2F%2Fdelvarworld.github.io%2Fblog%2F2013%2F03%2F16%2Fjust-use-sublime-text%2F
  380.  
  381. # Color schemes
  382. https://code.google.com/p/vimcolorschemetest/
  383.  
  384. # Plugins
  385. http://www.reddit.com/r/linux/comments/29a0ya/vim_awesome/
  386. http://lsh.io/plugtalk/#48
  387.  
  388.  
  389.  
  390. [[[ Drama ]]]
  391. http://www.reddit.com/r/linux/comments/1z0vig/ffmpeg_may_return_to_debian_and_by_extend_ubuntu/cfpjqtj
  392.  
  393.  
  394.  
  395. [[[ urxvt ]]]
  396. https://wiki.archlinux.org/index.php/rxvt-unicode
  397. http://wiki.afterstep.org/index.php?title=Rxvt-Unicode_Configuration_Tutorial
  398. http://manpages.ubuntu.com/manpages/precise/man7/urxvt.7.html
  399.  
  400.  
  401. [[[ FreeNAS ]]]
  402. # Check temps
  403. http://forums.freenas.org/index.php?threads/how-to-monitor-system-cpu-hdd-mobo-gpu-temperatures-on-freenas-8.2994/
  404.  
  405. # Checklist
  406. https://www.reddit.com/r/freenas/comments/1vw9ic/thinking_about_freenas_but_getting_overwhelmed/
  407.  
  408. # Backup config files automatically
  409. https://forums.freenas.org/index.php?threads/backup-config-file-every-night-automatically.8237/
  410.  
  411. # Persistent changes in the filesystem - http://kpaste.net/a2c0299
  412.  
  413. # The connection problem:
  414. https://www.reddit.com/r/linux4noobs/comments/2q2cn1/i_want_to_connect_to_my_isolated_nas_but_at_the/
  415. # Solutions:
  416. http://lamarque-lvs.blogspot.nl/2011/11/networkmanager-per-device-routing.html
  417. http://askubuntu.com/questions/89364/force-network-manager-to-use-wireless-for-an-internet-connection
  418. https://superuser.com/questions/9586/how-do-i-setup-ubuntu-linuxs-network-manager-to-selectively-route-network-traff
  419. http://ubuntuforums.org/showthread.php?t=2161887
  420.  
  421.  
  422. [[[ Hardware ]]]
  423. http://www.reddit.com/r/linux/comments/22cnui/pc_engines_apu_system_boards_3x_gige_2_or_4_gb/
  424. http://www.reddit.com/r/linux/comments/226izd/intel_releases_99_minnowboard_max_an_opensource/
  425.  
  426.  
  427.  
  428. [[[ TODO: ]]]
  429. Learn the filesystem hierarchy and major bits such as your bootloader, init system or systemd, etc
  430. File shares (Samba, NFS, iSCSI)
  431. Network Services (SSHD, DNS, DHCP, PXE, TFTP, FTP, etc)
  432. Automation (Scripting, Configuration management ie Ansible, Puppet, Chef, Saltstack)
  433. Hardening, Security and Accounts (IPTables, SELinux, patching/repository management, cgroups, encryption, permissions, ldap and kerberos SSO)
  434.  
  435.  
  436. ======================================================================
  437. HANDY COMMANDOS
  438.  
  439. ---
  440. # Archive directory
  441. tar -cvWf archive_name.tar dir_name
  442.  
  443. # Extract archive
  444. tar -xvf archive_name.tar
  445.  
  446. # GPG encrypt
  447. gpg -ac archive_name.tar
  448.  
  449. # GPG decrypt
  450. gpg -d archive_name.tar.asc > archive_name.tar
  451.  
  452. ---
  453. # CLI pastebin alias
  454. alias apaste='curl -F '\''paste=<-'\'' http://apaste.info/store'
  455.  
  456. # Do The Right Extract
  457. http://brettcsmith.org/2007/dtrx/
  458.  
  459. # How to check install size of packages (debian based)
  460. dpkg-query -Wf '${Installed-Size}\t${Package}\n' | sort -n | less
  461.  
  462. # Badblocks
  463. badblocks -nsv -p2 -o ./badblocksresult.txt /dev/sdX
  464.  
  465. # Watch progress of dd
  466. watch -n 1 killall -USR1 dd
  467.  
  468. # What's the best rsync command?
  469. rsync -avPHSxh
  470.  
  471. # Superfind
  472. http://stackoverflow.com/questions/16956810/finding-all-files-containing-a-text-string-on-linux
  473.  
  474. # List only dirs and files starting with a . (dot)
  475. ls -d .[^.]*
  476.  
  477.  
  478. diff <(ls /tmp/folder1) <(ls /tmp/folder2) # diff output of 2 commands
  479. diff -r /tmp/folder1 /tmp/folder2 # diff 2 dirs
  480.  
  481. # Substitute string1 to string2 in every file in a given path
  482. find path -type f -exec sed -i 's/string1/string2/' {} \;
  483.  
  484. ## in vim:
  485. # Visually select a block of text and prepend a '#' to it
  486. 1. Visually select block
  487. 2. Ctrl+v I # Esc
  488. # Do the reverse (remove prepending '#' characters)
  489. 1. Visually select block
  490. 2. Ctrl+v 0 x

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