kenn's questions

I'm running Ubuntu 20.04 mate desktop. I am customizing the mate-panel. I wanted to use the following digital font and I added the following style to ~/.config/gtk-3.0/gtk.css

#clock-applet-button.flat.toggle > box.horizontal > label {
    font-weight: normal;
    color: white;
    font-family: DS-Digital;
    font-weight: bold;
    font-size: 18px;
    /*padding-right: 10px;
    padding-left: 10px; */
    /*letter-spacing: 3px;*/
    /*margin: 8px; 
    margin-left: 14px;
    margin-right: 14px;*/
    padding: 0 15px 0 15px;
    font-stretch: ultra-condensed;
    outline-offset: 100px;
    background-color: red;
    /*border-left-width: 50px;
    border-right-width: 50px;*/
    /*outline-width: 20px;*/     
}
  

It's wiggling when numbers condensed, for example its width changes when clock digits counts from 00 to 01

I recorded it

I tried adding margins, padding but they didn't work. Is there a trick to fix it using gtk css?

I set up and installed Ubuntu 20.04 using debootstrap method

  debootstrap --arch=amd64 --variant=buildd focal ./focal_amd64  http://archive.ubuntu.com/ubuntu/ 

then installed all the rest. It runs well except old and new GNOME bugs. I have been using it for ten days. The day before I noticed that it's missing XDG_SESSION_ID. When I dug in I noticed that it's also missing XDG_SEAT, XDG_VTNR, XDG_SESSION_ID variables.
I read that those variables are set by pam modules https://www.freedesktop.org/software/systemd/man/pam_systemd.html

I added session optional pam_loginuid.so and session optional pam_systemd.so to /etc/pam.d/lightdm.

I tried both of the display managers gdm3 and lightdm. They both fail to set environment variables: XDG_SEAT, XDG_VTNR, XDG_SESSION_ID.

XDG_SEAT_PATH is only set in lightdm

I am having a difficulty at debugging it. How can I know which process set those variables which is missing in my system?

I am running Ubuntu 16.04. I want to undecorate (remove borders and title bar) of a window. I found an old posted scripts on the net claimed to be working but it doesn't work now.

To undecorate:

xprop -f _MOTIF_WM_HINTS 32c -set _MOTIF_WM_HINTS "0x2, 0x0, 0x0, 0x0, 0x0"

To redecorate:

xprop -f _MOTIF_WM_HINTS 32c -set _MOTIF_WM_HINTS "0x2, 0x0, 0x1, 0x0, 0x0"

Though this python script works

#! /usr/bin/python2
import gtk.gdk
w = gtk.gdk.window_foreign_new( gtk.gdk.get_default_root_window().property_get("_NET_ACTIVE_WINDOW")[2][0] )
w.set_decorations( (w.get_decorations()+1)%2 ) # toggle between 0 and 1
gtk.gdk.window_process_all_updates()
gtk.gdk.flush()

How can I toggle window decoration from terminal without python?

I have a USB flash memory, I created two partitions on it, when it is attached sometimes it takes sda , sda1 and sda4 instead of sdb, sdb1, sdb4. To prevent that confusion I decided to create a udev rule to symlink it under /dev persistently.

I created the below rule

ACTION=="add", SUBSYSTEM=="usb", ATTRS{idVendor}=="0461", ATTRS{idProduct}=="4d81", SYMLINK+="myusb"

When I reboot it creates symlink under /dev/myusb but I can not mount it.

 sudo mount /dev/myusb /media/myusb

 mount: /dev/bus/usb/002/003 is not a block device

I think I get that error because it contains two partitions. So what shoul I do?

Today I wanted to run ss -tpla command to see network connections, to my surprize I got error: unknown option -t. Then I checked location of ss command:

 ~$ whereis ss
 ss: /bin/ss /usr/local/bin/ss /usr/share/man/man8/ss.8.gz

As you see I have two ss commands, one in /bin/ss and the other in /usr/local/bin/ss.

I might have installed another application with the same name from source code into /usr/local/bin/ss. I don't remember when and usage of it but it's not the command I want to run. Strange thing is that when I run

 ss -tpla  

it redirects the command to /usr/local/bin/ss I can run actual ss command with

 /bin/ss  -tpla

I thought /bin has the priority over other paths.

My question is what determines priorities of system paths and how I can override them.

I am running Ubuntu 14.04.3, it's uptodate. I don't know why, for a few days I began to take grep: write error: Broken pipe message on launching gnome-terminal . It seems to be harmless but it bothers me. How can I debug it?

EDIT: I moved aliases and functions each to separate files such as .bash_aliases and .bash_functions and added a command to load them from .bashrc

 if [ -f ~/.bash_aliases ]; then
. ~/.bash_aliases
 fi

 if [ -f ~/.bash_functions ]; then
. ~/.bash_functions
 fi

If I don't load .bash_functions problem disappears.

I am trying to find the faulty one by disabling each function one by one.

This one gives me the same error but when I disable it I keep getting the same error, so I may have more faulty functions.

 ls -lt  $PWD| grep ^d | head -1 | cut -b 51- 

 grep:  development
 write error: Broken pipe

I wonder why I begin to take that error.

EDIT2:

I found a similar problem here boken pipe

The root of the problem also seems similar.

I tried the given test command in the link which have the same error:

 bash -c '(while echo foo; do :; done); echo status=$? >&2' |  head
 foo
 foo
 foo
 foo
 foo
 foo
 foo
 foo
 foo
 foo
 bash: line 0: echo: write error: Broken pipe
 status=0

EDIT3:

Though that unbuffer workaround I posted below as an answer to my own question works, I am not satisfied with it, but my knowledge about debugging is limited. Acoording to this link https://lists.gnu.org/archive/html/bug-coreutils/2007-11/msg00080.html it stems from SIGPIPE trap by another task, and this link https://lists.gnu.org/archive/html/bug-coreutils/2007-11/msg00154.html pinpoints the exact cause of the problem, it's one of the pam authentication module which I am in trouble with it recently.

I made a ~/.bashrc function to save some web directories into my local disk. It works well except some unwanted index files that is not present in the website. I use it like

crwl http://ioccc.org/2013/cable3/  

but it also retrieves some files such as index.html?C=D;O=A index.html?C=D;O=D index.html?C=M;O=A index.html?C=M;O=D index.html?C=N;O=A index.html?C=N;O=D index.html?C=S;O=A index.html?C=S;O=D

Complete file list:

 kenn@kenn:~/experiment/crwl/ioccc.org/2013/cable3$ ls
 bios        index.html?C=D;O=A  index.html?C=S;O=A           screenshot_flightsim4.png
 cable3.c    index.html?C=D;O=D  index.html?C=S;O=D           screenshot_lotus123.png
 fd.img      index.html?C=M;O=A  Makefile                     screenshot_qbasic.png
 hint.html   index.html?C=M;O=D  runme                        screenshot_simcity.png
 hint.text   index.html?C=N;O=A  sc-ioccc.terminal            screenshot_win3_on_macosx.png
 index.html  index.html?C=N;O=D  screenshot_autocad.png

I want to exclude those files while cloning that directory with wget Is there any wget switch or trick to clone a web directory as it is?

My script function in .bashrc:

crwl() {
wget --tries=inf --timestamping --recursive --level=inf --convert-links --page-requisites --no-parent "$@"

}

EDIT: I found two possible workarounds

1) Adding -R index.html?* flag

2) Adding -R =A,=D flag which rejects index.html?C=D;O=A files except index.html

I don't know which one is proper but both of them seem unsafe.

I frequently encounter path related problems while compiling or running an app.I have two versions of node in my system, one is from official repo, the other manually installed from source. Today I wanted to compile brackets, when I run npm install it asked me to use later version such as 1.4.20. Default version of it is in /usr/bin/npm which did't work. The manually installed one is in /usr/local/bin/npm

Is there any way to make /usr/local/bin/npm as default path using update-alternatives or another method?

For example you can set default text editor with

    sudo update-alternatives --config editor

Whenever I run an application in terminal as root (such as sudo gedit /etc/default/varnish) , subsequently when I open another terminal I get "ls: cannot access .gvfs: Permission denied" error at top line of terminal.

I found a solution on the net

  umount /path/to/.gvfs
  rm -rf .gvfs

but it only fixes problem temporarily.

It appears that I have two mounted instances of gvfs in my system

  $ sudo mount |grep gvfs
    gvfsd-fuse on /run/user/1000/gvfs type fuse.gvfsd-fuse (rw,nosuid,nodev,relatime,user_id=1000,group_id=33)
    gvfsd-fuse on /home/****/.gvfs type fuse.gvfsd-fuse (rw,nosuid,nodev,relatime,user_id=0,group_id=0)

I don't know if it's related to, a few months ago I had to change permission in my home folder like

  sudo chown -R $USER:www-data

Would you please help me fix it?

EDIT: After I unmount /run/user/1000/gvfs I don't get that error.

Though similar questions asked before in this forum here , here and here, my question is different. I want to get PID of a running bash process in gnome terminal.

Note: Suggested link which posted by moderators doesn't provide any working solution. I don't understand people ignorantly vote for closing my topic.

Commands like

 xprop | awk '/PID/ {print $3}' | xargs ps h -o pid,cmd
 xprop _NET_WM_PID | cut -d' ' -f3

give me only gnome-terminal parent PID not bash process ID

If I run

 PID=$$; echo $PID

or

 cut -d ' ' -f 4 /proc/self/stat

gives me exact PID of terminal but I have to run those commands in terminal to get the PID.

I have a script that toggles process of a terminal between kill -STOP PID and kill -CONT PID with a shortcut key combination.

    #!/bin/bash
    myid=$(ps $(xdotool getwindowfocus getwindowpid) |tail -n 1 |awk '{print $3}')
    if [[ $myid == "Sl" ]]
    then
    kill -STOP `xdotool getwindowfocus getwindowpid`
    else
    kill -CONT `xdotool getwindowfocus getwindowpid`
    fi

As I mentioned the line myid=$(ps $(xdotool getwindowfocus getwindowpid) |tail -n 1 |awk '{print $3}')

returns only PID of parent gnome-terminal

Is there a way to achieve what I want? `

EDIT: Beside Dmitry Alexandrov's answer, I also found another working solution here How to know the pid of active window

EDIT2: I spoke too early. I don't know why but above solution is not working reliably. So I am using Dmitry Alexandrov's solution, it works well except a glitch in my script.

   #!/bin/bash
   read __ __ TERM_PID < <(xprop _NET_WM_PID) &&\
   SH_PID=$(ps --ppid "$TERM_PID" -o pid=)
   mypid=$(echo $SH_PID | awk  ' { print $2 } ' )
   myid=$(ps $mypid |tail -n 1 |awk '{print $3}')
   if [[ $myid == "Sl" ]]
   then
   kill -STOP $mypid
   else
   kill -CONT $mypid
   fi
Note: Process STAT is not reliable, it doesn't always toggle between Sl and T, it sometimes takes different states such as `Ss+` `S<` 

EDIT3:

This one works well

   #!/bin/bash
   read __ __ TERM_PID < <(xprop _NET_WM_PID) &&\
   SH_PID=$(ps --ppid "$TERM_PID" -o pid=)
   mypid=$(echo $SH_PID | awk  ' { print $2 } ' )
   myid=$(ps $mypid |tail -n 1 |awk '{print $3}')
   if [[ *$myid* == *"S"* ]]
   then
   kill -STOP $mypid
   else
   kill -CONT $mypid
   fi

Generally codes published in web pages contains line numbers. When I copy and paste code into text editor (though some text editors remove line numbers automatically, but somtimes it doesn't work), it gets tiring to remove line numbers.

There must be some sed, awk or other linux parsing tools to deal with it.

Let's say I have below code, how can I remove line numbers safely with above mentioned tools?

   1 /*
   2  * Beep using pcm
   3  *
   4  * Copyright (c) by Takashi Iwai <[email protected]>
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  19  */
  20 
  21 #include <asm/io.h>
  22 #include <asm/irq.h>
  23 #include <linux/init.h>
  24 #include <linux/slab.h>
  25 #include <linux/input.h>
  26 #include <linux/pci.h>
  27 #include <linux/dma-mapping.h>
  28 #include <sound/core.h>
  29 #include <sound/control.h>
  30 #include "pmac.h"
  31 
  32 struct pmac_beep {
  33         int running;            /* boolean */
  34         int volume;             /* mixer volume: 0-100 */
  35         int volume_play;        /* currently playing volume */
  36         int hz;
  37         int nsamples;
  38         short *buf;             /* allocated wave buffer */
  39         dma_addr_t addr;        /* physical address of buffer */
  40         struct input_dev *dev;
  41 };
  42 
  43 /*
  44  * stop beep if running
  45  */
  46 void snd_pmac_beep_stop(struct snd_pmac *chip)
  47 {
  48         struct pmac_beep *beep = chip->beep;
  49         if (beep && beep->running) {
  50                 beep->running = 0;
  51                 snd_pmac_beep_dma_stop(chip);
  52         }
  53 }
  54 
  55 /*
  56  * Stuff for outputting a beep.  The values range from -327 to +327
  57  * so we can multiply by an amplitude in the range 0..100 to get a
  58  * signed short value to put in the output buffer.
  59  */
  60 static short beep_wform[256] = {
  61         0,      40,     79,     117,    153,    187,    218,    245,
  62         269,    288,    304,    316,    323,    327,    327,    324,
  63         318,    310,    299,    288,    275,    262,    249,    236,
  64         224,    213,    204,    196,    190,    186,    183,    182,
  65         182,    183,    186,    189,    192,    196,    200,    203,
  66         206,    208,    209,    209,    209,    207,    204,    201,
  67         197,    193,    188,    183,    179,    174,    170,    166,
  68         163,    161,    160,    159,    159,    160,    161,    162,
  69         164,    166,    168,    169,    171,    171,    171,    170,
  70         169,    167,    163,    159,    155,    150,    144,    139,
  71         133,    128,    122,    117,    113,    110,    107,    105,
  72         103,    103,    103,    103,    104,    104,    105,    105,
  73         105,    103,    101,    97,     92,     86,     78,     68,
  74         58,     45,     32,     18,     3,      -11,    -26,    -41,
  75         -55,    -68,    -79,    -88,    -95,    -100,   -102,   -102,
  76         -99,    -93,    -85,    -75,    -62,    -48,    -33,    -16,
  77         0,      16,     33,     48,     62,     75,     85,     93,
  78         99,     102,    102,    100,    95,     88,     79,     68,
  79         55,     41,     26,     11,     -3,     -18,    -32,    -45,
  80         -58,    -68,    -78,    -86,    -92,    -97,    -101,   -103,
  81         -105,   -105,   -105,   -104,   -104,   -103,   -103,   -103,
  82         -103,   -105,   -107,   -110,   -113,   -117,   -122,   -128,
  83         -133,   -139,   -144,   -150,   -155,   -159,   -163,   -167,
  84         -169,   -170,   -171,   -171,   -171,   -169,   -168,   -166,
  85         -164,   -162,   -161,   -160,   -159,   -159,   -160,   -161,
  86         -163,   -166,   -170,   -174,   -179,   -183,   -188,   -193,
  87         -197,   -201,   -204,   -207,   -209,   -209,   -209,   -208,
  88         -206,   -203,   -200,   -196,   -192,   -189,   -186,   -183,
  89         -182,   -182,   -183,   -186,   -190,   -196,   -204,   -213,
  90         -224,   -236,   -249,   -262,   -275,   -288,   -299,   -310,
  91         -318,   -324,   -327,   -327,   -323,   -316,   -304,   -288,
  92         -269,   -245,   -218,   -187,   -153,   -117,   -79,    -40,
  93 };
  94 
  95 #define BEEP_SRATE      22050   /* 22050 Hz sample rate */
  96 #define BEEP_BUFLEN     512
  97 #define BEEP_VOLUME     15      /* 0 - 100 */
  98 
  99 static int snd_pmac_beep_event(struct input_dev *dev, unsigned int type,
 100                                unsigned int code, int hz)
 101 {
 102         struct snd_pmac *chip;
 103         struct pmac_beep *beep;
 104         unsigned long flags;
 105         int beep_speed = 0;
 106         int srate;
 107         int period, ncycles, nsamples;
 108         int i, j, f;
 109         short *p;
 110 
 111         if (type != EV_SND)
 112                 return -1;
 113 
 114         switch (code) {
 115         case SND_BELL: if (hz) hz = 1000;
 116         case SND_TONE: break;
 117         default: return -1;
 118         }
 119 
 120         chip = input_get_drvdata(dev);
 121         if (! chip || (beep = chip->beep) == NULL)
 122                 return -1;
 123 
 124         if (! hz) {
 125                 spin_lock_irqsave(&chip->reg_lock, flags);
 126                 if (beep->running)
 127                         snd_pmac_beep_stop(chip);
 128                 spin_unlock_irqrestore(&chip->reg_lock, flags);
 129                 return 0;
 130         }
 131 
 132         beep_speed = snd_pmac_rate_index(chip, &chip->playback, BEEP_SRATE);
 133         srate = chip->freq_table[beep_speed];
 134 
 135         if (hz <= srate / BEEP_BUFLEN || hz > srate / 2)
 136                 hz = 1000;
 137 
 138         spin_lock_irqsave(&chip->reg_lock, flags);
 139         if (chip->playback.running || chip->capture.running || beep->running) {
 140                 spin_unlock_irqrestore(&chip->reg_lock, flags);
 141                 return 0;
 142         }
 143         beep->running = 1;
 144         spin_unlock_irqrestore(&chip->reg_lock, flags);
 145 
 146         if (hz == beep->hz && beep->volume == beep->volume_play) {
 147                 nsamples = beep->nsamples;
 148         } else {
 149                 period = srate * 256 / hz;      /* fixed point */
 150                 ncycles = BEEP_BUFLEN * 256 / period;
 151                 nsamples = (period * ncycles) >> 8;
 152                 f = ncycles * 65536 / nsamples;
 153                 j = 0;
 154                 p = beep->buf;
 155                 for (i = 0; i < nsamples; ++i, p += 2) {
 156                         p[0] = p[1] = beep_wform[j >> 8] * beep->volume;
 157                         j = (j + f) & 0xffff;
 158                 }
 159                 beep->hz = hz;
 160                 beep->volume_play = beep->volume;
 161                 beep->nsamples = nsamples;
 162         }
 163 
 164         spin_lock_irqsave(&chip->reg_lock, flags);
 165         snd_pmac_beep_dma_start(chip, beep->nsamples * 4, beep->addr, beep_speed);
 166         spin_unlock_irqrestore(&chip->reg_lock, flags);
 167         return 0;
 168 }
 169 
 170 /*
 171  * beep volume mixer
 172  */
 173 
 174 static int snd_pmac_info_beep(struct snd_kcontrol *kcontrol,
 175                               struct snd_ctl_elem_info *uinfo)
 176 {
 177         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 178         uinfo->count = 1;
 179         uinfo->value.integer.min = 0;
 180         uinfo->value.integer.max = 100;
 181         return 0;
 182 }
 183 
 184 static int snd_pmac_get_beep(struct snd_kcontrol *kcontrol,
 185                              struct snd_ctl_elem_value *ucontrol)
 186 {
 187         struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
 188         if (snd_BUG_ON(!chip->beep))
 189                 return -ENXIO;
 190         ucontrol->value.integer.value[0] = chip->beep->volume;
 191         return 0;
 192 }
 193 
 194 static int snd_pmac_put_beep(struct snd_kcontrol *kcontrol,
 195                              struct snd_ctl_elem_value *ucontrol)
 196 {
 197         struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
 198         unsigned int oval, nval;
 199         if (snd_BUG_ON(!chip->beep))
 200                 return -ENXIO;
 201         oval = chip->beep->volume;
 202         nval = ucontrol->value.integer.value[0];
 203         if (nval > 100)
 204                 return -EINVAL;
 205         chip->beep->volume = nval;
 206         return oval != chip->beep->volume;
 207 }
 208 
 209 static struct snd_kcontrol_new snd_pmac_beep_mixer = {
 210         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 211         .name = "Beep Playback Volume",
 212         .info = snd_pmac_info_beep,
 213         .get = snd_pmac_get_beep,
 214         .put = snd_pmac_put_beep,
 215 };
 216 
 217 /* Initialize beep stuff */
 218 int __devinit snd_pmac_attach_beep(struct snd_pmac *chip)
 219 {
 220         struct pmac_beep *beep;
 221         struct input_dev *input_dev;
 222         struct snd_kcontrol *beep_ctl;
 223         void *dmabuf;
 224         int err = -ENOMEM;
 225 
 226         beep = kzalloc(sizeof(*beep), GFP_KERNEL);
 227         if (! beep)
 228                 return -ENOMEM;
 229         dmabuf = dma_alloc_coherent(&chip->pdev->dev, BEEP_BUFLEN * 4,
 230                                     &beep->addr, GFP_KERNEL);
 231         input_dev = input_allocate_device();
 232         if (! dmabuf || ! input_dev)
 233                 goto fail1;
 234 
 235         /* FIXME: set more better values */
 236         input_dev->name = "PowerMac Beep";
 237         input_dev->phys = "powermac/beep";
 238         input_dev->id.bustype = BUS_ADB;
 239         input_dev->id.vendor = 0x001f;
 240         input_dev->id.product = 0x0001;
 241         input_dev->id.version = 0x0100;
 242 
 243         input_dev->evbit[0] = BIT_MASK(EV_SND);
 244         input_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(SND_TONE);
 245         input_dev->event = snd_pmac_beep_event;
 246         input_dev->dev.parent = &chip->pdev->dev;
 247         input_set_drvdata(input_dev, chip);
 248 
 249         beep->dev = input_dev;
 250         beep->buf = dmabuf;
 251         beep->volume = BEEP_VOLUME;
 252         beep->running = 0;
 253 
 254         beep_ctl = snd_ctl_new1(&snd_pmac_beep_mixer, chip);
 255         err = snd_ctl_add(chip->card, beep_ctl);
 256         if (err < 0)
 257                 goto fail1;
 258 
 259         chip->beep = beep;
 260 
 261         err = input_register_device(beep->dev);
 262         if (err)
 263                 goto fail2;
 264  
 265         return 0;
 266  
 267  fail2: snd_ctl_remove(chip->card, beep_ctl);
 268  fail1: input_free_device(input_dev);
 269         if (dmabuf)
 270                 dma_free_coherent(&chip->pdev->dev, BEEP_BUFLEN * 4,
 271                                   dmabuf, beep->addr);
 272         kfree(beep);
 273         return err;
 274 }
 275 
 276 void snd_pmac_detach_beep(struct snd_pmac *chip)
 277 {
 278         if (chip->beep) {
 279                 input_unregister_device(chip->beep->dev);
 280                 dma_free_coherent(&chip->pdev->dev, BEEP_BUFLEN * 4,
 281                                   chip->beep->buf, chip->beep->addr);
 282                 kfree(chip->beep);
 283                 chip->beep = NULL;
 284         }
 285 }
 286 

I have a list of lines like

/usr/lib/i386-linux-gnu/libavfilter.so
/usr/lib/i386-linux-gnu/libavfilter.so.3
/usr/lib/i386-linux-gnu/libavfilter.so.3.42.103
/usr/lib/i386-linux-gnu/i686/cmov/libavfilter.so
/usr/lib/i386-linux-gnu/i686/cmov/libavfilter.so.3
/usr/lib/i386-linux-gnu/i686/cmov/libavfilter.so.3.42.103
/usr/local/lib/libavfilter.so
/usr/local/lib/libavfilter.so.4
/usr/local/lib/libavfilter.so.4.4.100

How can I remove those files altogether instead of removing them one by one like

 rm        /usr/lib/i386-linux-gnu/libavfilter.so
 rm        /usr/lib/i386-linux-gnu/libavfilter.so.3
 rm        /usr/lib/i386-linux-gnu/libavfilter.so.3.42.103
 rm        /usr/lib/i386-linux-gnu/i686/cmov/libavfilter.so
 rm        /usr/lib/i386-linux-gnu/i686/cmov/libavfilter.so.3
 rm        /usr/lib/i386-linux-gnu/i686/cmov/libavfilter.so.3.42.103
 rm        /usr/local/lib/libavfilter.so
 rm        /usr/local/lib/libavfilter.so.4
 rm        /usr/local/lib/libavfilter.so.4.4.100

?

WARNING! Don't apply below commands without checking output at first

I am trying to make a simple screencasting bash script. I want to get screen selection coordinates by drawing a red rectangle with mouse. I can use xdotools to get coordinates but how can I draw rectangle on screen?

I have Ubuntu 13.10 32 bit system. Recently when I try to to compile by running ./autogen.sh and ./configure I get

 PKG_PROG_PKG_CONFIG: command not found

error. I have libtool installed. I have three aclocal files in usr/share/ like alocal, aclocal-1.13 and aclocal-1.4

How can I fix that alocal error?

EDIT:

Some time ago I compiled latest version of automake from source and installed it because a source code needed recent version of automake to run configure process. Since then whenever I run standard ./autogen and /configure commands in source directory to generate makefile I get

  PKG_PROG_PKG_CONFIG: command not found

error

  find /usr -name "pkg.m4"

gives me

  /usr/share/aclocal/pkg.m4

and

  aclocal --print-ac-dir

gives me

  /usr/local/share/aclocal

I have Ubuntu 13.10 32bit OS. A few days ago I added gnome3 ppa and upgraded to gtk 3.10. I had to fix many gnome bugs. But I couldn't find a solution to this one.

When I try to open display

LC_ALL=C gnome-control-center display

I get Could not get screen information error.

I don't know it's related to it; I can not generate Xorg.conf

with

sudo Xorg :1 -configure

I get

 sudo Xorg :1 -configure

  X.Org X Server 1.14.5
  Release Date: 2013-12-12
  X Protocol Version 11, Revision 0
  Build Operating System: Linux 3.2.0-54-generic i686 Ubuntu
  Current Operating System: Linux kenn 3.11.0-19-generic #33-Ubuntu SMP Tue Mar 11 18:48:32 UTC 2014 i686
  Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.11.0-19-generic root=UUID=c2d1b866-a0fd-4214-b79b-11b2af29da4d ro quiet splash vt.handoff=7
  Build Date: 17 December 2013  10:03:52AM
  xorg-server 2:1.14.5-1ubuntu2~saucy1 (For technical support please see http://www.ubuntu.com/support) 
  Current version of pixman: 0.30.2
Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.
  Markers: (--) probed, (**) from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
  (==) Log file: "/var/log/Xorg.1.log", Time: Wed Apr 23 12:08:43 2014
  setversion 1.4 failed
  List of video drivers:
sis
r128
neomagic
vmware
modesetting
openchrome
trident
dummy
ati
mach64
siliconmotion
mga
radeon
s3
cirrus
vesa
sisusb
qxl
tdfx
intel
nouveau
savage
fbdev
  (++) Using config file: "/home/****/xorg.conf.new"
  (==) Using system config directory "/usr/share/X11/xorg.conf.d"
  vesa: Ignoring device with a bound kernel driver
  Number of created screens does not match number of detected devices.
    Configuration failed.
  (EE) Server terminated with error (2). Closing log file.

Here is my driver info

  lspci -nn | grep -i vga 
  00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (primary) [8086:2a02] (rev 03)

I hope you help me fix it.

After upgrading packages my system is not booting anymore. How can I list last updated packages from terminal in order to revert the changes? Or is there a simpler way to take back latest upgrade?

I installed Lingoes dictionary in Wine. It has a popup translator that is triggered by clipboard change. When I copy or select an item it must translate the word, but in Wine, when I copy or select a word, Lingoes dictionary remains unresponsive as if nothing has been copied. I can paste into Lingoes dictionary through right click context menu then it translates.

How can I enable auto clipboard sync between Wine and X11?

Yesterday I removed some two tiny partions from the disk,today it won't boot. I opened my computer from USB now, but I can not install grub from chroot. I run sudo blkidand I noticed that my ubuntu installed partition moved from sda6 to sda5. First I ran sudo mount /dev/sda5 /mnt then sudo grub-install --root-directory=/mnt /dev/sda5 but I got the following error.

 /usr/sbin/grub-bios-setup: warning: File system `ext2' doesn't support embedding.
 /usr/sbin/grub-bios-setup: warning: Embedding is not possible.  GRUB can only be    installed in this setup by using blocklists.  However, blocklists are UNRELIABLE and their   use is discouraged..
 /usr/sbin/grub-bios-setup: error: will not proceed with blocklists.

Would you please tell me what to do now?

I want to extract name of removed packages from here "cat /var/log/dpkg.log | grep 'remove'"

 2013-09-09 15:57:34 remove activity-log-manager:i386 0.9.4-0ubuntu6.2 <none>
 2013-09-09 15:57:35 remove activity-log-manager-control-center:i386 0.9.4-0ubuntu6.2 <none>
 2013-09-09 15:57:38 remove alacarte:all 3.6.1-0ubuntu3 <none>
 2013-09-09 15:57:41 remove deepin-software-center:all 2.1.2.1~precise~NoobsLab.com <none>

I want to grab only name of the packages between remove and colon after package name. I am not a regex expert, I made a regex expression that seems to do the job but when I want to apply it with grep nothing happens. Here is working regex pattern in regex evaluators

(?<=remove)(.*?)(?=:)

But this is not working :

cat /var/log/dpkg.log | grep 'remove' | grep '(?<=remove)(.*?)(?=:)'

What am I missing here?

This is a radically updated version of the question. I have to update this because this question is flagged as duplicate of this one, while this has no valid answer anymore.

• Initial version of this question, which had the 11.04 tag:

I am new to scripting and linux, my comp gets too hot sometimes and I want to make a script to detect temp1 and if it's over 65 C, it must put it to sleep. I have a diffuculty at comparing values in the script, I couldn't manage to define figures correctly, would anybody fix it please? Here is my stab at it so far

#!/bin/bash

max=65

val=$   sensors | grep '^temp1:' | sed -e 's/.*: \+\([+-][0-9.]\+\)°C.*$/0\1/'

while true; do
    if [[ "$val" > "$max" ]]; then
        sudo /etc/acpi/sleep.sh force
        sleep 1
    else
        sleep 10
    fi
    clear
    sensors
done

The above got an answer with a script that according to the comments was at some point updated to work in 14.04:

 #!/bin/bash

 while true; do
    val=$(sensors | awk '/temp1/ {print $2}')
    max="+75.0"
    if [[ "$val" > "$max" ]]; then
        dbus-send --system --print-reply --dest="org.freedesktop.UPower" /org/freedesktop/UPower org.freedesktop.UPower.Suspend
    fi
    sleep 10
    clear
    sensors
 done
 exit 0

As indicated in the linked question, the above script doesn't work in 16.04.

That question got an answer with a simplistically modified version of the script:

 #!/bin/bash

 while true; do
    val=$(sensors | awk '/temp1/ {print $2}')
    max="+75.0"
    if [[ "$val" > "$max" ]]; then
        systemctl suspend
    fi
    clear
    sensors
 done
 exit 0

But while it does the job (the system goes to sleep when going above 75), it takes more CPU power than expected and pushes the temperature up while running up to 10 degrees celsius; this is more useful, more cooling when not running!

I don't know if the problem is with the initial 11.04 script or with the last change but this needs a fresh answer for 16.04.