Hello, I am trying to install the xt package un my Ubuntu 22.4 env but the X11 env is missing. I try to install: *sudo apt install libx11-dev*   but I do not find any X11 package installed. Who can help me ? Thanks a lot. Giulia *Da:* Elora Afrin &lt;elora.afrin(a)students.tamuk.edu&gt; *Inviato:* martedì 13 giugno 2023 02:03 *A:* David Forel &lt;davidforel(a)yahoo.com&gt; *Cc:* seisunix(a)mailman.seismic-unix.org *Oggetto:* [Seisunix] Re: Help with getting headerword Hello, Thank you so much for your consideration. I attached the screenshot what I got adding key1=sy. I also attached the range of my original file where sy is missing. I don’t have access to my computer right now, so I just attached the screenshot from my phone, I apologize for that. Thanks. I am looking forward to hearing from you. Sincerely, Elora Get Outlook for iOS <https://aka.ms/o0ukef> ------------------------------------------------------------------------ *From:*David Forel &lt;davidforel(a)yahoo.com&gt; *Sent:* Monday, June 12, 2023 6:47:54 PM *To:* Elora Afrin &lt;elora.afrin(a)students.tamuk.edu&gt; *Cc:* seisunix(a)mailman.seismic-unix.org &lt;seisunix(a)mailman.seismic-unix.org&gt; *Subject:* Re: [Seisunix] Help with getting headerword Hi Elora - It might help us to see the output of surange.  David Sent from my cell phone. On Jun 12, 2023, at 4:41 PM, Elora Afrin &lt;elora.afrin(a)students.tamuk.edu&gt; wrote:  Hello Everyone, Greetings. I have a su file where sy header is missing. How can I set a correcect sy values? I went through sushw and suchw  and saw some basic information. I tried Key1=sy, key2=sx and key3=gx but noticed that I got gy values but gx and gy are same which is not supposed to be. I do not know the first value of gy. I request you to help me to set gy values. Thank you. Sincerely, Elora _______________________________________________ Seisunix mailing list -- seisunix(a)mailman.seismic-unix.org To unsubscribe send an email to seisunix-leave(a)mailman.seismic-unix.org _______________________________________________ Seisunix mailing list --seisunix(a)mailman.seismic-unix.org To unsubscribe send an email toseisunix-leave(a)mailman.seismic-unix.org