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Linux: Difference between revisions
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= System = | = System = | ||
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These commands remove volumes named ''laravelhome'' and ''laravelhtml'', and then increase ''lv_var'' volume with the remaining space. | These commands remove volumes named ''laravelhome'' and ''laravelhtml'', and then increase ''lv_var'' volume with the remaining space. | ||
< | <syntaxhighlight lang="console"> | ||
[root@it153coai01lnx ~]# lsblk | [root@it153coai01lnx ~]# lsblk | ||
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT | NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT | ||
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/dev/mapper/vg00-lv_varlog 3.8G 103M 3.7G 3% /var/log | /dev/mapper/vg00-lv_varlog 3.8G 103M 3.7G 3% /var/log | ||
tmpfs 182M 0 182M 0% /run/user/4323 | tmpfs 182M 0 182M 0% /run/user/4323 | ||
</ | </syntaxhighlight> | ||
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{{testedon|2020-07-06|CentOS 8.1.1911}} | {{testedon|2020-07-06|CentOS 8.1.1911}} | ||
< | <syntaxhighlight lang="console"> | ||
[root@chara mhan]# lsblk | [root@chara mhan]# lsblk | ||
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT | NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT | ||
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tmpfs 1.6G 4.0K 1.6G 1% /run/user/1000 | tmpfs 1.6G 4.0K 1.6G 1% /run/user/1000 | ||
[root@chara mhan]# | [root@chara mhan]# | ||
</ | </syntaxhighlight> | ||
=== Links === | === Links === | ||
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List all audio cards you have: | List all audio cards you have: | ||
< | <syntaxhighlight lang="bash"> | ||
$ cat /proc/asound/cards | $ cat /proc/asound/cards | ||
0 [PCH ]: HDA-Intel - HDA Intel PCH | 0 [PCH ]: HDA-Intel - HDA Intel PCH | ||
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2 [SoundBar ]: USB-Audio - Dell AC511 USB SoundBar | 2 [SoundBar ]: USB-Audio - Dell AC511 USB SoundBar | ||
Dell Dell AC511 USB SoundBar at usb-0000:00:14.0-4, full speed | Dell Dell AC511 USB SoundBar at usb-0000:00:14.0-4, full speed | ||
</ | </syntaxhighlight> | ||
Get ALSA identifiers of those: | Get ALSA identifiers of those: | ||
< | <syntaxhighlight lang="bash"> | ||
$ aplay -l | awk -F \: '/,/{print $2}' | awk '{print $1}' | uniq | $ aplay -l | awk -F \: '/,/{print $2}' | awk '{print $1}' | uniq | ||
PCH | PCH | ||
NVidia | NVidia | ||
SoundBar | SoundBar | ||
</ | </syntaxhighlight> | ||
Update /etc/asound.conf: | Update /etc/asound.conf: | ||
< | <syntaxhighlight lang="ini"> | ||
pcm.!default { | pcm.!default { | ||
type hw | type hw | ||
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card SoundBar | card SoundBar | ||
} | } | ||
</ | </syntaxhighlight> | ||
I found that the numeric identifier for these cards and change on reboot. That may be related to how the hardware detection works on Linux, and the order changes time to time. So I've used the string identifier instead -- seems to stick better than a numeric value. | I found that the numeric identifier for these cards and change on reboot. That may be related to how the hardware detection works on Linux, and the order changes time to time. So I've used the string identifier instead -- seems to stick better than a numeric value. | ||
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Restart pulseaudio. Do not sudo for this. | Restart pulseaudio. Do not sudo for this. | ||
< | <syntaxhighlight lang="console"> | ||
$ pulseaudio -k && pulseaudio -D | $ pulseaudio -k && pulseaudio -D | ||
</ | </syntaxhighlight> | ||
List sinks. | List sinks. | ||
< | <syntaxhighlight lang="console"> | ||
$ pacmd list-sinks | $ pacmd list-sinks | ||
1 sink(s) available. | 1 sink(s) available. | ||
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active port: <analog-output> | active port: <analog-output> | ||
</ | </syntaxhighlight> | ||
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{{testedon|2020-10-21|RHEL 7.8}} | {{testedon|2020-10-21|RHEL 7.8}} | ||
< | <syntaxhighlight lang="console"> | ||
# running a yum update yields the following | # running a yum update yields the following | ||
file /etc/os-release from install of redhat-release-server-7.9-3.el7.x86_64 conflicts with file from package oraclelinux-release-7:7.8-1.0.7.el7.x86_64 | file /etc/os-release from install of redhat-release-server-7.9-3.el7.x86_64 conflicts with file from package oraclelinux-release-7:7.8-1.0.7.el7.x86_64 | ||
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$ sudo find /var/cache/yum -type f -name "redhat-release-server*" -exec rpm -Uvh --force {} \; | $ sudo find /var/cache/yum -type f -name "redhat-release-server*" -exec rpm -Uvh --force {} \; | ||
$ sudo yum --disablerepo="*" --enablerepo="rhel*" --disablerepo="oraclelinux*" --disablerepo="rhel-source*" --disablerepo="rhel-beta*" update -y && sudo yum -y upgrade && sudo yum -y autoremove | $ sudo yum --disablerepo="*" --enablerepo="rhel*" --disablerepo="oraclelinux*" --disablerepo="rhel-source*" --disablerepo="rhel-beta*" update -y && sudo yum -y upgrade && sudo yum -y autoremove | ||
</ | </syntaxhighlight> | ||