我注意到pkgs.org和类似的平台已停止托管 CentOS 7 软件包。
还有其他地方可以下载与 CentOS 7 兼容的 RPM 包吗?
我通过 VNC 与 Centos & 机器的连接不太完美。一个问题是回声慢;更糟糕的是按键重复。当我以cat
正常速度输入 时,几秒钟后我看到cattttttt
。是否可以修改键盘重复字符延迟或直接禁用它?
使用命令 stat file.txt 我得到
Access: 2024-06-10 14:55:36.254879000 +0300
Modify: 2024-06-10 14:55:36.254879000 +0300
Change: 2024-06-10 14:55:36.254879000 +0300
Birth: -
我在集群中工作,因此我不是 sudo,也无法执行任何 sudo 命令。请注意,操作系统非常老旧(如您所见),因此 statx 对我来说不起作用。
$ lsb_release -a
LSB Version: :core-4.1-amd64:core-4.1-noarch
Distributor ID: CentOS
Description: CentOS Linux release 7.9.2009 (Core)
Release: 7.9.2009
Codename: Core
所以想问一下有没有什么方法可以查看出生时间。
谢谢
假设我在 Linux 机器上的 shell 会话中,并且我想获取如果我以图形方式登录并必须选择桌面环境/会话类型时将拥有的选项列表。我期望一个包含“kde”、“gnome”、“xfce4”、“cinnamon”等项目的列表。
笔记:
[vagrant@localhost vagrant]$ sudo chmod 755 luser-demo01.sh
[vagrant@localhost vagrant]$ ls -l
total 5
-rwxrwxrwx 1 vagrant vagrant 101 May 30 19:44 luser-demo01.sh
-rwxrwxrwx 1 vagrant vagrant 3464 May 30 19:16 Vagrantfile
[vagrant@localhost vagrant]$ chmod 755 luser-demo01.sh
[vagrant@localhost vagrant]$ ls -l
total 5
-rwxrwxrwx 1 vagrant vagrant 101 May 30 19:44 luser-demo01.sh
-rwxrwxrwx 1 vagrant vagrant 3464 May 30 19:16 Vagrantfile
[vagrant@localhost vagrant]$
我正在尝试使用 将上述 .sh 文件的文件权限从 777 更改为 755 chmod
,但它不起作用。我尝试过使用其他权限,例如 600 和 666,chmod
但文件权限永远不会改变。我使用的是 CentOS 7。
我的命令如下:sudo chmod 755 <filename>
或chmod 755 <filename>
.
建议我使用它chown
来获得文件的所有权。然而,在尝试之后,我发现即使这样也没有按预期工作。我附上下面的图片以供参考。我可能使用了错误的命令。
[vagrant@localhost vagrant]$ chown -c root luser-demo01.sh
changed ownership of 'luser-demo01.sh' from vagrant to root
[vagrant@localhost vagrant]$ ls -l
total 5
-rwxrwxrwx 1 vagrant vagrant 101 May 30 19:44 luser-demo01.sh
-rwxrwxrwx 1 vagrant vagrant 3464 May 30 19:16 Vagrantfile
[vagrant@localhost vagrant]$
命令输出findmnt
如下:
[vagrant@localhost vagrant]$ findmnt -T /vagrant
TARGET SOURCE FSTYPE OPTIONS
/vagrant /vagrant vboxsf rw,nodev,relatime
/vagrant vagrant vboxsf rw,nodev,relatime
我收到错误:
May 29 19:15:02 vps3.domain.com crond[19846]: pam_limits(crond:session): invalid line 'user3 hard nproc ' - skipped
May 29 19:15:02 vps3.domain.com crond[19846]: pam_limits(crond:sess:on): invalid line 'user4 hard nproc ' - skipped
cron 行是:
* * * * * /usr/local/bin/php /home/user3/public_html/api/crons/cron-mailer.php
我已经尝试过很多来自堆栈的解决方案,但都没有用。
我试过了:
在 /etc/security/limits.conf 中添加
根软 nproc 200000
root 硬盘 nproc 200000
sysctl1 -w fs.文件最大值=200000
重新启动 cron 但我仍然收到上述错误systemctl status crond
由于我根本无法运行任何 cron,如何解决这个问题?
更新: /etc/security/limits.conf 的内容
# /etc/security/limits.conf
#
#This file sets the resource limits for the users logged in via PAM.
#It does not affect resource limits of the system services.
#
#Also note that configuration files in /etc/security/limits.d directory,
#which are read in alphabetical order, override the settings in this
#file in case the domain is the same or more specific.
#That means for example that setting a limit for wildcard domain here
#can be overriden with a wildcard setting in a config file in the
#subdirectory, but a user specific setting here can be overriden only
#with a user specific setting in the subdirectory.
#
#Each line describes a limit for a user in the form:
#
#<domain> <type> <item> <value>
#
#Where:
#<domain> can be:
# - a user name
# - a group name, with @group syntax
# - the wildcard *, for default entry
# - the wildcard %, can be also used with %group syntax,
# for maxlogin limit
#
#<type> can have the two values:
# - "soft" for enforcing the soft limits
# - "hard" for enforcing hard limits
#
#<item> can be one of the following:
# - core - limits the core file size (KB)
# - data - max data size (KB)
# - fsize - maximum filesize (KB)
# - memlock - max locked-in-memory address space (KB)
# - nofile - max number of open file descriptors
# - rss - max resident set size (KB)
# - stack - max stack size (KB)
# - cpu - max CPU time (MIN)
# - nproc - max number of processes
# - as - address space limit (KB)
# - maxlogins - max number of logins for this user
# - maxsyslogins - max number of logins on the system
# - priority - the priority to run user process with
# - locks - max number of file locks the user can hold
# - sigpending - max number of pending signals
# - msgqueue - max memory used by POSIX message queues (bytes)
# - nice - max nice priority allowed to raise to values: [-20, 19]
# - rtprio - max realtime priority
#
#<domain> <type> <item> <value>
#
#* soft core 0
#* hard rss 10000
#@student hard nproc 20
#@faculty soft nproc 20
#@faculty hard nproc 50
#ftp hard nproc 0
#@student - maxlogins 4
# End of file
* soft nofile 200000
* hard nofile 200000
* soft nproc 200000
* hard nproc 200000
root soft nofile 200000
root hard nofile 200000
root soft nproc 200000
root hard nproc 200000
更新 2: /etc/security/limit.d/ 中的文件
20-nproc.conf 内容:
# Default limit for number of user's processes to prevent
# accidental fork bombs.
# See rhbz #432903 for reasoning.
* soft nproc 4096
root soft nproc unlimited
然后每个用户都有一个文件,其内容如下:
user1 hard nproc
user1 hard nofile
我以 CentOS 版本 6.9 HPC 的用户身份登录。当我尝试该ls
命令时,我得到:
/usr/local/bin/ls: 第 96 行: dpkg: 未找到命令 中止,此脚本仅适用于类似 Ubuntu 的发行版
当我打开相应的 ls 文件时,第 96 行有以下行:
# (internal) The architecture of the local system
arch=$(dpkg --print-architecture)
我知道 dpkg 是 Debian 的东西,这就是为什么它不能在 CentOS 上工作。但为什么 dpkg 在那里呢?我如何运行一个简单的ls
?
我需要在 CentOS 7.9 中启用 SCSI 支持,因此我按照此处的说明进行操作:
https://wiki.centos.org/HowTos(2f)I_need_the_Kernel_Source.html
添加 SCSI 支持并重新编译,这按预期工作,但3.10.0-1160.108.1.el7.x86_64
它不是 uname -r reporting ,而是仅报告3.10.0
,并且它在 /boot 中创建的 vmlinuz 文件也以这种方式命名。
尽管 rpmbuild 目录中的所有路径都有全名,但仍然如此。
UTS_RELEASE
文件中的条目是include/generated/utsrelease.h
这样3.10.0
的,所以我编辑了它并重新编译,但它做了同样的事情。
如何重新编译内核以便uname -r
报告正确的版本?
我需要安装 Qt 6 开发文件以在 CentOS 7 中构建第三方应用程序。我被告知 Ubuntu 22.04 LTS 需要以下软件包:
我检查了 CentOS 7 软件包存储库,在这些存储库中找不到任何 Qt 软件包。有没有在 CentOS 7 中安装 Qt 6 的指南?
我是 Linux 新手,我在实验室安装了 CentOS 7.9。我不知道为什么,有时风扇噪音很大,然后我输入top
看看是哪一个造成的,我发现“dhclient”甚至消耗了700%+的CPU(我的CPU有8核?)
15967 sshd 30 10 3707632 2.4g 4692 S 784.7 16.0 158:32.13 dhclient
4134 ring 20 0 4258860 326992 113188 S 9.1 2.0 38:51.93 gnome-shell
2495 root 20 0 599888 223084 95240 S 1.4 1.4 5:20.28 X
4780 ring 20 0 681880 41128 19908 S 1.4 0.3 0:31.30 gnome-terminal-
11130 root 20 0 39476 1276 988 S 1.4 0.0 8:44.93 monitor
9 root 20 0 0 0 0 S 0.3 0.0 0:20.52 rcu_sched
728 root -51 0 0 0 0 S 0.3 0.0 0:03.63 irq/141-iwlwifi
4102 ring 20 0 68396 2496 1860 S 0.3 0.0 0:00.47 dbus-daemon
18583 ring 20 0 2828144 168724 62708 S 0.3 1.1 1:52.56 Isolated Web Co
18806 ring 20 0 2768992 126664 60628 S 0.3 0.8 1:17.29 Isolated Web Co
24739 ring 20 0 58680 2484 1532 R 0.3 0.0 0:00.15 top
1 root 20 0 194644 7792 4236 S 0.0 0.0 0:07.88 systemd
2 root 20 0 0 0 0 S 0.0 0.0 0:00.05 kthreadd
然后我使用cat /var/log/messages | grep dhclient
,这些是消息,有人可以帮助找出发生了什么吗?我应该怎么做才能解决这个问题?
Jan 1 20:22:51 eda dhclient[15264]: DHCPDISCOVER on virbr0 to 255.255.255.255 port 67 interval 15 (xid=0x6ae2ab58)
Jan 1 20:22:54 eda dhclient: [2024-01-01 20:22:54.479] net new job from 3389.xiao.my.id:3389 diff 8910K algo rx/0 height 154453
Jan 1 20:23:06 eda dhclient[15264]: DHCPDISCOVER on virbr0 to 255.255.255.255 port 67 interval 9 (xid=0x6ae2ab58)
Jan 1 20:23:15 eda dhclient[15264]: DHCPDISCOVER on virbr0 to 255.255.255.255 port 67 interval 11 (xid=0x6ae2ab58)
Jan 1 20:23:26 eda dhclient[15264]: DHCPDISCOVER on virbr0 to 255.255.255.255 port 67 interval 10 (xid=0x6ae2ab58)
Jan 1 20:23:36 eda dhclient[15264]: DHCPDISCOVER on virbr0 to 255.255.255.255 port 67 interval 7 (xid=0x6ae2ab58)
Jan 1 20:23:42 eda dhclient: [2024-01-01 20:23:42.031] net new job from 3389.xiao.my.id:3389 diff 9061K algo rx/0 height 154454
Jan 1 20:23:42 eda dhclient: [2024-01-01 20:23:42.956] miner speed 10s/60s/15m 1220.6 1257.6 n/a H/s max 2571.8 H/s
Jan 1 20:23:43 eda dhclient[15264]: No DHCPOFFERS received.
Jan 1 20:23:43 eda dhclient[15264]: No working leases in persistent database - sleeping.
Jan 1 20:24:43 eda dhclient: [2024-01-01 20:24:43.326] miner speed 10s/60s/15m 1151.4 1164.1 n/a H/s max 2571.8 H/s
Jan 1 20:25:43 eda dhclient: [2024-01-01 20:25:43.586] miner speed 10s/60s/15m 1205.5 1283.1 n/a H/s max 2571.8 H/s
Jan 1 20:26:31 eda dhclient[15264]: DHCPDISCOVER on virbr0-nic to 255.255.255.255 port 67 interval 6 (xid=0x364db7a7)
Jan 1 20:26:37 eda dhclient[15264]: DHCPDISCOVER on virbr0-nic to 255.255.255.255 port 67 interval 11 (xid=0x364db7a7)
Jan 1 20:26:43 eda dhclient: [2024-01-01 20:26:43.948] miner speed 10s/60s/15m 1326.5 1178.2 n/a H/s max 2571.8 H/s
Jan 1 20:26:48 eda dhclient[15264]: DHCPDISCOVER on virbr0-nic to 255.255.255.255 port 67 interval 9 (xid=0x364db7a7)
Jan 1 20:26:57 eda dhclient[15264]: DHCPDISCOVER on virbr0-nic to 255.255.255.255 port 67 interval 14 (xid=0x364db7a7)
Jan 1 20:27:11 eda dhclient[15264]: DHCPDISCOVER on virbr0-nic to 255.255.255.255 port 67 interval 14 (xid=0x364db7a7)
Jan 1 20:27:25 eda dhclient[15264]: DHCPDISCOVER on virbr0-nic to 255.255.255.255 port 67 interval 7 (xid=0x364db7a7)
Jan 1 20:27:32 eda dhclient[15264]: No DHCPOFFERS received.
Jan 1 20:27:32 eda dhclient[15264]: No working leases in persistent database - sleeping.
Jan 1 20:27:44 eda dhclient: [2024-01-01 20:27:44.309] miner speed 10s/60s/15m 1342.5 1264.8 n/a H/s max 2571.8 H/s
Jan 1 20:28:44 eda dhclient: [2024-01-01 20:28:44.574] miner speed 10s/60s/15m 1427.7 1411.3 n/a H/s max 2571.8 H/s
Jan 1 20:29:04 eda dhclient: [2024-01-01 20:29:04.105] net new job from 3389.xiao.my.id:3389 diff 9216K algo rx/0 height 154455
Jan 1 20:29:32 eda dhclient: [2024-01-01 20:29:32.452] net new job from 3389.xiao.my.id:3389 diff 9216K algo rx/0 height 154456
Jan 1 20:29:44 eda dhclient: [2024-01-01 20:29:44.895] miner speed 10s/60s/15m 1118.9 1353.9 n/a H/s max 2571.8 H/s
Jan 1 20:30:13 eda dhclient: [2024-01-01 20:30:13.226] net new job from 3389.xiao.my.id:3389 diff 9118K algo rx/0 height 154457
Jan 1 20:30:45 eda dhclient: [2024-01-01 20:30:45.234] miner speed 10s/60s/15m 1296.6 1291.8 n/a H/s max 2571.8 H/s
Jan 1 20:30:54 eda dhclient[15264]: DHCPDISCOVER on virbr0 to 255.255.255.255 port 67 interval 5 (xid=0x611c174c)
Jan 1 20:30:59 eda dhclient[15264]: DHCPDISCOVER on virbr0 to 255.255.255.255 port 67 interval 12 (xid=0x611c174c)
Jan 1 20:31:11 eda dhclient[15264]: DHCPDISCOVER on virbr0 to 255.255.255.255 port 67 interval 14 (xid=0x611c174c)
Jan 1 20:31:14 eda dhclient[15264]: DHCPDISCOVER on virbr0-nic to 255.255.255.255 port 67 interval 7 (xid=0x31c502a2)
Jan 1 20:31:21 eda dhclient[15264]: DHCPDISCOVER on virbr0-nic to 255.255.255.255 port 67 interval 7 (xid=0x31c502a2)
Jan 1 20:31:25 eda dhclient[15264]: DHCPDISCOVER on virbr0 to 255.255.255.255 port 67 interval 21 (xid=0x611c174c)
Jan 1 20:31:28 eda dhclient[15264]: DHCPDISCOVER on virbr0-nic to 255.255.255.255 port 67 interval 15 (xid=0x31c502a2)
Jan 1 20:31:43 eda dhclient[15264]: DHCPDISCOVER on virbr0-nic to 255.255.255.255 port 67 interval 16 (xid=0x31c502a2)
Jan 1 20:31:45 eda dhclient: [2024-01-01 20:31:45.554] miner speed 10s/60s/15m 769.6 1097.3 n/a H/s max 2571.8 H/s
Jan 1 20:31:46 eda dhclient[15264]: DHCPDISCOVER on virbr0 to 255.255.255.255 port 67 interval 9 (xid=0x611c174c)
Jan 1 20:31:55 eda dhclient[15264]: No DHCPOFFERS received.
Jan 1 20:31:55 eda dhclient[15264]: No working leases in persistent database - sleeping.
Jan 1 20:31:59 eda dhclient[15264]: DHCPDISCOVER on virbr0-nic to 255.255.255.255 port 67 interval 8 (xid=0x31c502a2)
Jan 1 20:32:07 eda dhclient[15264]: DHCPDISCOVER on virbr0-nic to 255.255.255.255 port 67 interval 8 (xid=0x31c502a2)
Jan 1 20:32:15 eda dhclient[15264]: No DHCPOFFERS received.
Jan 1 20:32:15 eda dhclient[15264]: No working leases in persistent database - sleeping.
Jan 1 20:32:45 eda dhclient: [2024-01-01 20:32:45.899] miner speed 10s/60s/15m 998.0 1224.7 n/a H/s max 2571.8 H/s
Jan 1 20:33:46 eda dhclient: [2024-01-01 20:33:46.186] miner speed 10s/60s/15m 1248.5 1226.1 n/a H/s max 2571.8 H/s
Jan 1 20:34:46 eda dhclient: [2024-01-01 20:34:46.456] miner speed 10s/60s/15m 1401.2 1338.0 n/a H/s max 2571.8 H/s
Jan 1 20:35:03 eda dhclient: [2024-01-01 20:35:03.174] net new job from 3389.xiao.my.id:3389 diff 9118K algo rx/0 height 154458
这是完整的消息,ChatGPT 说“benchmk”与加密货币有关?!
Jan 1 21:02:29 eda dhclient: [2024-01-01 21:02:29.421] cpu READY threads 16/16 (16) huge pages 0% 0/16 memory 4096 KB (8 ms)
Jan 1 21:02:38 eda dhclient[15264]: DHCPDISCOVER on virbr0 to 255.255.255.255 port 67 interval 11 (xid=0x50f8e063)
Jan 1 21:02:39 eda dhclient: [2024-01-01 21:02:39.419] benchmk Algo rx/arq hashrate: 5719.956009
Jan 1 21:02:39 eda dhclient: [2024-01-01 21:02:39.419] benchmk Algo panthera Preparation
Jan 1 21:02:39 eda dhclient: [2024-01-01 21:02:39.420] cpu stopped (1 ms)
Jan 1 21:02:39 eda dhclient: [2024-01-01 21:02:39.420] randomx init dataset algo panthera (8 threads) seed 0000000000000000...
Jan 1 21:02:39 eda dhclient: [2024-01-01 21:02:39.784] randomx dataset ready (365 ms)
Jan 1 21:02:39 eda dhclient: [2024-01-01 21:02:39.785] cpu use profile panthera (4 threads) scratchpad 256 KB
Jan 1 21:02:39 eda dhclient: [2024-01-01 21:02:39.792] benchmk Algo panthera Starting test
Jan 1 21:02:39 eda dhclient: [2024-01-01 21:02:39.799] cpu READY threads 4/4 (4) huge pages 0% 0/4 memory 1024 KB (15 ms)
Jan 1 21:02:49 eda dhclient[15264]: DHCPDISCOVER on virbr0 to 255.255.255.255 port 67 interval 12 (xid=0x50f8e063)
Jan 1 21:02:49 eda dhclient: [2024-01-01 21:02:49.794] benchmk Algo panthera hashrate: 1384.323135
Jan 1 21:02:49 eda dhclient: [2024-01-01 21:02:49.794] benchmk ALGO PERFORMANCE CALIBRATION COMPLETE
Jan 1 21:02:49 eda dhclient: [2024-01-01 21:02:49.908] net 3389.xiao.my.id:3389 read error: "end of file"
Jan 1 21:02:57 eda dhclient: [2024-01-01 21:02:57.191] net 3389.xiao.my.id:3389 read error: "connection reset by peer"
Jan 1 21:03:01 eda dhclient[15264]: DHCPDISCOVER on virbr0 to 255.255.255.255 port 67 interval 10 (xid=0x50f8e063)
Jan 1 21:03:04 eda dhclient: [2024-01-01 21:03:04.333] net 3389.xiao.my.id:3389 read error: "connection reset by peer"
Jan 1 21:03:05 eda dhclient: [2024-01-01 21:03:05.258] miner speed 10s/60s/15m n/a n/a n/a H/s max 1474.6 H/s
Jan 1 21:03:11 eda dhclient[15264]: No DHCPOFFERS received.
Jan 1 21:03:11 eda dhclient[15264]: No working leases in persistent database - sleeping.
Jan 1 21:03:29 eda dhclient: [2024-01-01 21:03:29.739] net 3389.xiao.my.id:3389 34.126.66.198 connect error: "operation canceled"
Jan 1 21:03:34 eda dhclient: [2024-01-01 21:03:34.861] net 3389.xiao.my.id:3389 read error: "end of file"
Jan 1 21:04:05 eda dhclient: [2024-01-01 21:04:05.419] miner speed 10s/60s/15m n/a n/a n/a H/s max 1474.6 H/s
Jan 1 21:05:05 eda dhclient: [2024-01-01 21:05:05.630] miner speed 10s/60s/15m n/a n/a n/a H/s max 1474.6 H/s
Jan 1 21:06:05 eda dhclient: [2024-01-01 21:06:05.877] miner speed 10s/60s/15m n/a n/a n/a H/s max 1474.6 H/s
Jan 1 21:07:06 eda dhclient: [2024-01-01 21:07:06.089] miner speed 10s/60s/15m n/a n/a n/a H/s max 1474.6 H/s
Jan 1 21:07:39 eda kernel: Bluetooth: hci0: Hardware error 0x0c
Jan 1 21:07:39 eda kernel: Bluetooth: hci0: Retrieving Intel exception info failed (-16)
Jan 1 21:08:06 eda dhclient: [2024-01-01 21:08:06.299] miner speed 10s/60s/15m n/a n/a n/a H/s max 1474.6 H/s
Jan 1 21:09:06 eda dhclient: [2024-01-01 21:09:06.494] miner speed 10s/60s/15m n/a n/a n/a H/s max 1474.6 H/s
Jan 1 21:09:31 eda dhclient[15264]: DHCPDISCOVER on virbr0-nic to 255.255.255.255 port 67 interval 7 (xid=0xc3a3862)
Jan 1 21:09:38 eda dhclient[15264]: DHCPDISCOVER on virbr0-nic to 255.255.255.255 port 67 interval 14 (xid=0xc3a3862)
Jan 1 21:09:52 eda dhclient[15264]: DHCPDISCOVER on virbr0-nic to 255.255.255.255 port 67 interval 12 (xid=0xc3a3862)
从这里开始新工作?这是正常的吗?
Jan 1 21:32:13 eda dhclient: [2024-01-01 21:32:13.299] net new job from 3389.xiao.my.id:3389 diff 8819K algo rx/0 height 154489