我在我的VMServer上部署了一个全新的CentOS 6.5实例，其中包含了开发工具，X11和其他一些安装包。第一天，似乎每件事都很好。后来我无法使用 yum 安装程序来更新或安装任何软件包，它会抛出错误，如下所示：
[root@localDev ~]# yum update
Loaded plugins: fastestmirror, refresh-packagekit, security
Cannot open logfile /var/log/yum.log
Could not create lock at /var/run/yum.pid: [Errno 30] Read-only file system: '/var/run/yum.pid'
Another app is currently holding the yum lock; waiting for it to exit...
The other application is: yum
Memory : 20 M RSS (315 MB VSZ)
Started: Wed Jul 20 22:01:54 2016 - 00:03 ago
State : Running, pid: 10750
Another app is currently holding the yum lock; waiting for it to exit...
The other application is: yum
Memory : 20 M RSS (315 MB VSZ)
Started: Wed Jul 20 22:01:54 2016 - 00:05 ago
State : Running, pid: 10750
Another app is currently holding the yum lock; waiting for it to exit...
The other application is: yum
Memory : 20 M RSS (315 MB VSZ)
Started: Wed Jul 20 22:01:54 2016 - 00:07 ago
State : Running, pid: 10750
Another app is currently holding the yum lock; waiting for it to exit...
The other application is: yum
Memory : 20 M RSS (315 MB VSZ)
Started: Wed Jul 20 22:01:54 2016 - 00:09 ago
State : Running, pid: 10750
Another app is currently holding the yum lock; waiting for it to exit...
The other application is: yum
Memory : 20 M RSS (315 MB VSZ)
Started: Wed Jul 20 22:01:54 2016 - 00:11 ago
State : Running, pid: 10750
^C
Exiting on user cancel.
[root@localDev ~]#
即使没有这样的进程在ps命令的结果中使用上面提到的 pid 10750 运行。
[root@localDev ~]# ps -eaf
UID PID PPID C STIME TTY TIME CMD
root 1 0 0 Jul19 ? 00:00:00 /sbin/init
root 2 0 0 Jul19 ? 00:00:00 [kthreadd]
root 3 2 0 Jul19 ? 00:00:00 [migration/0]
root 4 2 0 Jul19 ? 00:00:00 [ksoftirqd/0]
root 5 2 0 Jul19 ? 00:00:00 [migration/0]
root 6 2 0 Jul19 ? 00:00:00 [watchdog/0]
root 7 2 0 Jul19 ? 00:00:00 [migration/1]
root 8 2 0 Jul19 ? 00:00:00 [migration/1]
root 9 2 0 Jul19 ? 00:00:00 [ksoftirqd/1]
root 10 2 0 Jul19 ? 00:00:00 [watchdog/1]
root 11 2 0 Jul19 ? 00:00:02 [events/0]
root 12 2 0 Jul19 ? 00:01:03 [events/1]
root 13 2 0 Jul19 ? 00:00:00 [cgroup]
root 14 2 0 Jul19 ? 00:00:00 [khelper]
root 15 2 0 Jul19 ? 00:00:00 [netns]
root 16 2 0 Jul19 ? 00:00:00 [async/mgr]
root 17 2 0 Jul19 ? 00:00:00 [pm]
root 18 2 0 Jul19 ? 00:00:00 [sync_supers]
root 19 2 0 Jul19 ? 00:00:00 [bdi-default]
root 20 2 0 Jul19 ? 00:00:00 [kintegrityd/0]
root 21 2 0 Jul19 ? 00:00:00 [kintegrityd/1]
root 22 2 0 Jul19 ? 00:00:00 [kblockd/0]
root 23 2 0 Jul19 ? 00:00:00 [kblockd/1]
root 24 2 0 Jul19 ? 00:00:00 [kacpid]
root 25 2 0 Jul19 ? 00:00:00 [kacpi_notify]
root 26 2 0 Jul19 ? 00:00:00 [kacpi_hotplug]
root 27 2 0 Jul19 ? 00:00:00 [ata_aux]
root 28 2 0 Jul19 ? 00:00:00 [ata_sff/0]
root 29 2 0 Jul19 ? 00:00:00 [ata_sff/1]
root 30 2 0 Jul19 ? 00:00:00 [ksuspend_usbd]
root 31 2 0 Jul19 ? 00:00:00 [khubd]
root 32 2 0 Jul19 ? 00:00:00 [kseriod]
root 33 2 0 Jul19 ? 00:00:00 [md/0]
root 34 2 0 Jul19 ? 00:00:00 [md/1]
root 35 2 0 Jul19 ? 00:00:00 [md_misc/0]
root 36 2 0 Jul19 ? 00:00:00 [md_misc/1]
root 37 2 0 Jul19 ? 00:00:00 [linkwatch]
root 38 2 0 Jul19 ? 00:00:00 [khungtaskd]
root 39 2 0 Jul19 ? 00:00:00 [kswapd0]
root 40 2 0 Jul19 ? 00:00:00 [ksmd]
root 41 2 0 Jul19 ? 00:00:00 [khugepaged]
root 42 2 0 Jul19 ? 00:00:00 [aio/0]
root 43 2 0 Jul19 ? 00:00:00 [aio/1]
root 44 2 0 Jul19 ? 00:00:00 [crypto/0]
root 45 2 0 Jul19 ? 00:00:00 [crypto/1]
root 50 2 0 Jul19 ? 00:00:00 [kthrotld/0]
root 51 2 0 Jul19 ? 00:00:00 [kthrotld/1]
root 52 2 0 Jul19 ? 00:00:00 [pciehpd]
root 54 2 0 Jul19 ? 00:00:00 [kpsmoused]
root 55 2 0 Jul19 ? 00:00:00 [usbhid_resumer]
root 85 2 0 Jul19 ? 00:00:00 [kstriped]
root 162 2 0 Jul19 ? 00:00:00 [scsi_eh_0]
root 163 2 0 Jul19 ? 00:00:00 [scsi_eh_1]
root 169 2 0 Jul19 ? 00:00:02 [mpt_poll_0]
root 170 2 0 Jul19 ? 00:00:00 [mpt/0]
root 187 2 0 Jul19 ? 00:00:37 [scsi_eh_2]
root 291 2 0 Jul19 ? 00:00:00 [jbd2/sda2-8]
root 292 2 0 Jul19 ? 00:00:00 [ext4-dio-unwrit]
root 381 1 0 Jul19 ? 00:00:00 /sbin/udevd -d
root 564 2 0 Jul19 ? 00:00:02 [vmmemctl]
root 713 2 0 Jul19 ? 00:00:00 [jbd2/sda1-8]
root 714 2 0 Jul19 ? 00:00:00 [ext4-dio-unwrit]
root 715 2 0 Jul19 ? 00:00:00 [jbd2/sda3-8]
root 716 2 0 Jul19 ? 00:00:00 [ext4-dio-unwrit]
root 717 2 0 Jul19 ? 00:00:00 [jbd2/sda6-8]
root 718 2 0 Jul19 ? 00:00:00 [ext4-dio-unwrit]
root 761 2 0 Jul19 ? 00:00:00 [kauditd]
root 995 1 0 Jul19 ? 00:00:00 auditd
root 1020 1 0 Jul19 ? 00:00:01 /sbin/rsyslogd -i /var/run/syslogd.pid -c 5
root 1050 1 0 Jul19 ? 00:00:14 irqbalance --pid=/var/run/irqbalance.pid
rpc 1064 1 0 Jul19 ? 00:00:00 rpcbind
rpcuser 1082 1 0 Jul19 ? 00:00:00 rpc.statd
dbus 1192 1 0 Jul19 ? 00:00:00 dbus-daemon --system
root 1208 1 0 Jul19 ? 00:00:00 cupsd -C /etc/cups/cupsd.conf
root 1233 1 0 Jul19 ? 00:00:00 /usr/sbin/acpid
68 1242 1 0 Jul19 ? 00:00:00 hald
root 1243 1242 0 Jul19 ? 00:00:00 hald-runner
root 1282 1243 0 Jul19 ? 00:00:00 hald-addon-input: Listening on /dev/input/event0 /dev/input/event2
68 1290 1243 0 Jul19 ? 00:00:00 hald-addon-acpi: listening on acpid socket /var/run/acpid.socket
root 1310 1 0 Jul19 ? 00:00:00 automount --pid-file /var/run/autofs.pid
root 1343 1 0 Jul19 ? 00:00:00 /usr/sbin/sshd
postgres 1377 1 0 Jul19 ? 00:00:00 /usr/pgsql-9.2/bin/postmaster -p 5432 -D /var/lib/pgsql/9.2/data
postgres 1379 1377 0 Jul19 ? 00:00:00 postgres: logger process
postgres 1381 1377 0 Jul19 ? 00:00:00 postgres: checkpointer process
postgres 1382 1377 0 Jul19 ? 00:00:00 postgres: writer process
postgres 1383 1377 0 Jul19 ? 00:00:01 postgres: wal writer process
postgres 1384 1377 0 Jul19 ? 00:01:13 postgres: autovacuum launcher process
postgres 1385 1377 0 Jul19 ? 00:00:01 postgres: stats collector process
root 1463 1 0 Jul19 ? 00:00:00 /usr/libexec/postfix/master
postfix 1472 1463 0 Jul19 ? 00:00:00 qmgr -l -t fifo -u
root 1487 1 0 Jul19 ? 00:00:00 /usr/sbin/abrtd
root 1506 1 0 Jul19 ? 00:00:00 /usr/sbin/atd
root 1545 1 0 Jul19 ? 00:00:00 /usr/sbin/certmonger -S -p /var/run/certmonger.pid
root 1558 1 0 Jul19 tty1 00:00:00 /sbin/mingetty /dev/tty1
root 1560 1 0 Jul19 tty2 00:00:00 /sbin/mingetty /dev/tty2
root 1562 1 0 Jul19 tty3 00:00:00 /sbin/mingetty /dev/tty3
root 1564 1 0 Jul19 tty4 00:00:00 /sbin/mingetty /dev/tty4
root 1566 1 0 Jul19 tty5 00:00:00 /sbin/mingetty /dev/tty5
root 1568 1 0 Jul19 tty6 00:00:00 /sbin/mingetty /dev/tty6
root 1569 381 0 Jul19 ? 00:00:00 /sbin/udevd -d
root 1570 381 0 Jul19 ? 00:00:00 /sbin/udevd -d
root 10436 1343 0 19:28 ? 00:00:00 sshd: root@pts/0
root 10438 1343 0 19:28 ? 00:00:00 sshd: root@notty
root 10440 10438 0 19:28 ? 00:00:00 /usr/libexec/openssh/sftp-server
root 10449 10436 0 19:28 pts/0 00:00:00 -bash
postfix 10670 1463 0 21:15 ? 00:00:00 pickup -l -t fifo -u
root 10756 2 0 22:04 ? 00:00:00 [flush-8:0]
root 10765 10449 0 22:09 pts/0 00:00:00 ps -eaf
[root@localDev ~]#
经过一些谷歌搜索后，发现根分区在安装程序中安装为ro 。尝试使用命令mount -o remount,rw /将根分区“/”重新安装为rw，这会产生另一条错误消息：
[root@localDev ~]# mount -o remount,rw /
mount: cannot remount block device /dev/sda2 read-write, is write-protected
以下是命令cat /proc/mounts的输出：
[root@localDev ~]# cat /proc/mounts
rootfs / rootfs rw 0 0
proc /proc proc rw,relatime 0 0
sysfs /sys sysfs rw,relatime 0 0
devtmpfs /dev devtmpfs rw,relatime,size=1952148k,nr_inodes=488037,mode=755 0 0
devpts /dev/pts devpts rw,relatime,gid=5,mode=620,ptmxmode=000 0 0
tmpfs /dev/shm tmpfs rw,relatime 0 0
/dev/sda2 / ext4 ro,relatime,barrier=1,data=ordered 0 0
/proc/bus/usb /proc/bus/usb usbfs rw,relatime 0 0
/dev/sda1 /boot ext4 rw,relatime,barrier=1,data=ordered 0 0
/dev/sda3 /home ext4 rw,relatime,barrier=1,data=ordered 0 0
/dev/sda6 /tmp ext4 rw,relatime,barrier=1,data=ordered 0 0
none /proc/sys/fs/binfmt_misc binfmt_misc rw,relatime 0 0
/etc/auto.misc /misc autofs rw,relatime,fd=7,pgrp=1310,timeout=300,minproto=5,maxproto=5,indirect 0 0
-hosts /net autofs rw,relatime,fd=13,pgrp=1310,timeout=300,minproto=5,maxproto=5,indirect 0 0
cgroup /cgroup/cpuset cgroup rw,relatime,cpuset 0 0
cgroup /cgroup/cpu cgroup rw,relatime,cpu 0 0
cgroup /cgroup/cpuacct cgroup rw,relatime,cpuacct 0 0
cgroup /cgroup/memory cgroup rw,relatime,memory 0 0
cgroup /cgroup/devices cgroup rw,relatime,devices 0 0
cgroup /cgroup/freezer cgroup rw,relatime,freezer 0 0
cgroup /cgroup/net_cls cgroup rw,relatime,net_cls 0 0
cgroup /cgroup/blkio cgroup rw,relatime,blkio 0 0
此设置有什么问题？凭借我的小调试知识，尝试在引导期间修改安装配置并导致结果失败。请建议我解决此问题。
提前致谢...
答案 0 :(得分：0)
»另一个应用程序目前持有yum锁;等待它 出口 ... 另一个应用是：yum«
CentOS 6.5是旧版本，“2013年1月12日”。当前的更新级别为6.8。
您可以等待“搜索更新过程”以完成“1000”更新，或者终止该过程。
答案 1 :(得分：0)
尝试执行以下命令。
[root@xyz ~]# ps -ef | grep yum
root 4511 4383 24 15:21 ? 00:00:39 /usr/bin/python/usr/share/PackageKit/helpers/yum/yumBackend.py get-updates none
root 4558 4524 0 15:24 pts/1 00:00:00 grep yum
[root@xyz ~]# kill 4511
现在执行#yum update
答案 2 :(得分：0)
这是因为另一个持有解决方案的应用程序我们应该杀死当前正在运行的进程
要了解当前正在运行的进程ID： -
$ ps aux | grep yum
root 2640 1 0 Nov09？ 00:00:00 / usr / bin / python -tt / usr / sbin / yum-updatesd
root 13974 6577 0 10:27 pts / 1 00:00:00 grep yum
root 17552 2640 0 09:16？ 00:00:00 / usr / bin / python -tt / usr / libexec / yum-updatesd-helper --check --dbus
杀死这个过程： -
$ kill process_id
终止所有正在运行的过程
杀2640
杀死17552
请再次检查是否有其他进程正在运行。如果它然后杀死那个。
现在更新
$ yum update -y
答案 3 :(得分：0)
选项＃1 终止进程
kill -9 process_id
选项＃2 终止所有yum进程
killall -9 yum
选项＃3 删除yum.pid process_id
rm -f /var/run/yum.pid 2600
yum -y update
答案 4 :(得分：0)
解决这个问题的简单方法
rm -f /var/run/yum.pid