shell

  1. A

    How to prevent service/system output while working in interactive shell.

    Hello, is there any way to prevent the system from printing to vt? It's quite annoying when I edit files in vi or ed and the system suddenly tells me that a USB device has disconnected, overwriting the interactive shell. The same goes for services like samba_service. Can anyone tell me how to...
  2. byrnejb

    Shell bash - validate input date

    This has to have a simple answer somewhere but cannot seem to find it for FreeBSD specifically. Given this input: DT='2022.02.30' I want to determine that this date is invalid. I first turned to the date utility: echo $DT ; date -j -f '%Y.%m.%d' $DT ; echo $? 2022.02.30 Wed Mar 2 15:56:22...
  3. T

    selectively remove arguments from shell script

    I have been writing a bunch of shell scripts that essentially wrap existing commands so I don't need to remember the intricate details for most of what I want to do. I have a shell script that essentially builds parameters to call another executable. Some of the arguments should not be...
  4. blind0ne

    Shell set the root for script to run another scripts outside

    Hello, Please, give me an advice, how to set the / for my script, to it accidentally no to "bound out" the borders of my "program" that consist of a lot of a sh scripts. Should I choose the "chroot" for this? Peace
  5. blind0ne

    Shell General Commands Manual

    Hello, I've entered man read from sh shell and saw pushd and popd inside but there is no such builtin in sh, it's bash' builtin, Which command should I use for referencing sh builtins?
  6. blind0ne

    Shell Trying to learn shell scripts (create own service to run on boot)

    Hello, I'm trying to understand the process of starting scripts and understand shell itself. I would like to ask: what is $rc_fast_and_loose? in if [ -n "$rc_fast_and_loose" ]; then set $_arg; . $_file what is -n here? is it True if the length of "STRING" is non-zero. ? and what...
  7. I

    How to limit search result of directories/files to limited top-level directories only?

    I did a find / -name 'XXX' and the output is insane. It lists every file and the list never ends (I had to Ctrl-C to stop it). How can I view the results meaningfully? For example, I'd like to limit to the result to appear only for, say the top-level (or top 2nd or 3rd level) directories only...
  8. I

    rc.d shell scripts: no extension vs. .sh

    I think I asked this question sometime ago, but I can't find the answer when searching for it. Anyway... First, I think I know the difference for startup shell scripts located in /etc/rc.d and /usr/local/etc/rc.d. The former is for system scripts while the latter is for user-installed scripts...
  9. F

    Solved How do I use the command “cut” to select the 2nd field in a string variable?

    I'm using FreeBSD version: 11.3-RELEASE-p14, Shell version: tcsh 6.20.00 (Astron) 2016-11-24 (x86_64-amd-FreeBSD) options wide, nls, dl,al, kan, sm, rh, color, filec and trying to use cut to harvest fields in a string variable, with no success. #! /bin/sh . # Variables filelength=0 start=0...
  10. T

    Shell sed: rename(): Not a directory

    Hi! Why does sed exaust "sed: rename(): Not a directory" called sed -i ~ 's/^\#\+\(PermitRootLogin\) .*$/\1 yes/g' /etc/ssh/sshd_config The manual states: -i extension Edit files in-place similarly to -I, but treat each file independently from other files. In...
  11. C

    Solved Shell Script IPC/RPC Messaging Between Different Hosts?

    I would like one of my hosts to broadcast occasional periodic signals to a shell script running on other host(s) on the same LAN. I'm currently reading about various IoT protocols, but I'm wondering what the more traditional approaches were for this kind of messaging. Ideally, I'd want some...
  12. quamenzullo

    Solved Correct syntax for the 'a' function of FreeBSD's sed?

    I'd liked to use the 'a' function of sed to append something after a given line in a file. For instance, I want to add "ListenAddress xx.xx.xxx.xxx" after the line that begins with "#ListenAddress" in a copy of sshd_config: Using sh I do: # IP=xx.xx.xxx.xxx # sed -E -i ""...
  13. I

    jails How do I "setenv PATH" in a jail, preferably using zsh?

    If I execute the command: setenv PATH "/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin:/root/bin:/root/.cargo/bin" after going into the jail by "jexec 1", it would work. However, I'd like to make it sticky. I tried many ways but nothing works. Further, preferably, I'd like to do...
  14. sidetone

    Shell Change text colors in Ion shell?

    How would I change the text color in shells/ion shell? The color for some texts is too similar to the background on my display. From the directory, /usr/local/share/doc/ion/: migrating.md variables/07-namespaces.md has a lot of information on color schemes for Ion. When I switch to a...
  15. S

    locale issues

    I'm trying to extract from a tarball. (I don’t need help with that.) But I get this nonsense: Pathname can’t be converted from UTF-8 to current locale When I enter the command locale the LANG= line is empty. Hoo boy Yup! everything that's easy in any version of linux is like being...
  16. StreetDancer

    FreeBSD 12.1 - Updated System & "su" root user no longer shows root@domain.tld; blank #

    FreeBSD 12.1 - Updated System & "su" root user no longer shows root@domain.tld; blank # I am not sure what happened or how to revert the changes that a system "pkg upgrade" did to my installation. I used to ssh in and get user@domain.tld ... then issue "su" and get "root@domain.tld" ; now it's...
  17. NapoleonWils0n

    editing audio and video with ffmpeg - scripts and youtube videos

    Hi I have written some shell scripts (bourne shell not bash) for basic video and audio editing tasks with ffmpeg A lot of the open source video editors dont really compare to Final Cut Pro or Davinci Resolve, and can be difficult to get hardware encoding working Thats why i decided to write...
  18. L

    Shell regexp and shell script changing url links to base64 in css files

    so this script can alter the url to data64 encoding by matching in css file background-image: url(afdsf.png). some contribute this: echo 'background-image: url("../images/doesntmatter/imgDoesNotMatter.png");' | sed -r 's,background-image\s*:\s*url\("(.+)"\);,\1,'...
  19. T

    Shell How to parse a text file?

    I am looking to parse a file for specific content that is on a line that always has a specific beginning, for example: "Program: code" I want to extract code on the line that starts with Program. I then want to add that extracted string into an already created file. Can anyone provide some...
  20. vermaden

    HOWTO: Ghost in the Shell - Part 4

    I would like to share HOWTO in Ghost in the Shell series about efficient working in the UNIX shell environment. Ghost in the Shell - Part 4 https://vermaden.wordpress.com/2019/03/15/ghost-in-the-shell-part-4/ Regards, vermaden
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