我刚刚安装了Ubuntu。我的问题是我正在尝试将日志文件写入首页。我正在logcat从名为的python模块中使用adb。当我尝试使用终端命令时，adb logcat -f <path>我应该能够将此日志输出到硬盘驱动器上的文本文件中，但是却出现了以下错误：
couldn't open output file: Read-only file system
尽管尝试执行该命令sudo adb logcat -f <path>。因为<path>我主要只是尝试'log'和'log.txt'
我能够使用将文件写入磁盘，cat >并且可以毫无问题地保存文件。我读过这可能是由硬盘故障引起的，但是到目前为止，我还没有看到任何其他证据。我们将不胜感激，以帮助您理解为什么会发生这种情况以及如何克服它。万一有人想知道，我有必要将此文件输出到磁盘。
编辑：
我应该指出，我的交换分区确实存在问题。/dev/mapper/cryptswap1 is not ready yet or not present在启动过程中，我在启动屏幕上遇到了一个错误（措辞不正确），但是我重新格式化并制作了一个新的交换分区，从而消除了该错误。但是，无论在解决问题之前还是现在，gparted都将交换分区标记为“未知”。free -m显示没有问题，也没有swapon -s
编辑：的输出sudo mount
/dev/sda5 on / type ext4 (rw,errors=remount-ro)
proc on /proc type proc (rw,noexec,nosuid,nodev)
sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
none on /sys/fs/cgroup type tmpfs (rw)
none on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
udev on /dev type devtmpfs (rw,mode=0755)
devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755)
none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880)
none on /run/shm type tmpfs (rw,nosuid,nodev)
none on /run/user type tmpfs (rw,noexec,nosuid,nodev,size=104857600,mode=0755)
none on /sys/fs/pstore type pstore (rw)
/dev/sda7 on /home type ext4 (rw)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,noexec,nosuid,nodev)
systemd on /sys/fs/cgroup/systemd type cgroup (rw,noexec,nosuid,nodev,none,name=systemd)
/home/me/.Private on /home/me type ecryptfs (ecryptfs_check_dev_ruid,ecryptfs_cipher=aes,ecryptfs_key_bytes=16,ecryptfs_unlink_sigs,ecryptfs_sig=cbb0ed41b9f457c5,ecryptfs_fnek_sig=9e985b7d47d6e940)
gvfsd-fuse on /run/user/1000/gvfs type fuse.gvfsd-fuse (rw,nosuid,nodev,user=me)
输出apt-cache policy 'sytemd*'：
Version table:
*** 204-0ubuntu19.1 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy-updates/main amd64 Packages
100 /var/lib/dpkg/status
204-0ubuntu18 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
root-system-bin:
Installed: (none)
Candidate: 5.34.09-1
Version table:
5.34.09-1 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/universe amd64 Packages
libboost-filesystem1.50-dev:
Installed: (none)
Candidate: (none)
Version table:
libmono-system-data4.0-cil:
Installed: (none)
Candidate: 2.10.8.1-5ubuntu2
Version table:
2.10.8.1-5ubuntu2 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
libmono-system-runtime4.0-cil:
Installed: (none)
Candidate: 2.10.8.1-5ubuntu2
Version table:
2.10.8.1-5ubuntu2 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
libmono-system-windows-forms4.0-cil:
Installed: (none)
Candidate: 2.10.8.1-5ubuntu2
Version table:
2.10.8.1-5ubuntu2 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
qemu-system-or32:
Installed: (none)
Candidate: (none)
Version table:
xen-system:
Installed: (none)
Candidate: (none)
Version table:
libmono-system2.0-cil:
Installed: (none)
Candidate: 2.10.8.1-5ubuntu2
Version table:
2.10.8.1-5ubuntu2 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
libsystemu-ruby1.8:
Installed: (none)
Candidate: 2.5.1-1
Version table:
2.5.1-1 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/universe amd64 Packages
system-image-dev:
Installed: (none)
Candidate: 1.9.1-0ubuntu1
Version table:
1.9.1-0ubuntu1 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/universe amd64 Packages
libsystemsettings1:
Installed: (none)
Candidate: 0.1+13.10.20131015.2-0ubuntu1
Version table:
0.1+13.10.20131015.2-0ubuntu1 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/universe amd64 Packages
xen-linux-system-686-pae:
Installed: (none)
Candidate: (none)
Version table:
libmono-system-data-linq4.0-cil:
Installed: (none)
Candidate: 2.10.8.1-5ubuntu2
Version table:
2.10.8.1-5ubuntu2 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
ubuntu-system-service:
Installed: 0.2.5
Candidate: 0.2.5
Version table:
*** 0.2.5 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
100 /var/lib/dpkg/status
qemu-system-s390x:
Installed: (none)
Candidate: (none)
Version table:
libboost-filesystem1.53.0:
Installed: (none)
Candidate: 1.53.0-6+exp3ubuntu8
Version table:
1.53.0-6+exp3ubuntu8 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
libmono-system-runtime-serialization4.0-cil:
Installed: (none)
Candidate: 2.10.8.1-5ubuntu2
Version table:
2.10.8.1-5ubuntu2 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
qemu-system-ppcemb:
Installed: (none)
Candidate: (none)
Version table:
libmono-system-ldap4.0-cil:
Installed: (none)
Candidate: 2.10.8.1-5ubuntu2
Version table:
2.10.8.1-5ubuntu2 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
systemc:
Installed: (none)
Candidate: (none)
Version table:
system-config-printer:
Installed: (none)
Candidate: (none)
Version table:
systemd:
Installed: (none)
Candidate: (none)
Version table:
qemu-system-sh4:
Installed: (none)
Candidate: (none)
Version table:
xen-linux-system-amd64:
Installed: (none)
Candidate: (none)
Version table:
qemu-system-xtensa:
Installed: (none)
Candidate: (none)
Version table:
libmono-system-transactions4.0-cil:
Installed: (none)
Candidate: 2.10.8.1-5ubuntu2
Version table:
2.10.8.1-5ubuntu2 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
libghc-system-fileio-prof-0.3.10-17c22:
Installed: (none)
Candidate: (none)
Version table:
libmono-system-windows-forms-datavisualization4.0-cil:
Installed: (none)
Candidate: 2.10.8.1-5ubuntu2
Version table:
2.10.8.1-5ubuntu2 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
libghc-system-filepath-prof:
Installed: (none)
Candidate: 0.4.7-2build1
Version table:
0.4.7-2build1 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/universe amd64 Packages
libqtsysteminfo1:
Installed: (none)
Candidate: 1.2.0-3ubuntu5
Version table:
1.2.0-3ubuntu5 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/universe amd64 Packages
system-tools-backends-dev:
Installed: (none)
Candidate: 2.10.2-1ubuntu1
Version table:
2.10.2-1ubuntu1 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/universe amd64 Packages
libboost-system1.52-dev:
Installed: (none)
Candidate: (none)
Version table:
system-config-samba:
Installed: (none)
Candidate: 1.2.63-0ubuntu5
Version table:
1.2.63-0ubuntu5 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/universe amd64 Packages
libmono-system-security4.0-cil:
Installed: (none)
Candidate: 2.10.8.1-5ubuntu2
Version table:
2.10.8.1-5ubuntu2 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
libboost-filesystem1.46-dev:
Installed: (none)
Candidate: (none)
Version table:
libghc-filesystem-conduit-doc:
Installed: (none)
Candidate: 1.0.0-2build1
Version table:
1.0.0-2build1 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/universe amd64 Packages
root-system-common:
Installed: (none)
Candidate: 5.34.09-1
Version table:
5.34.09-1 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/universe amd64 Packages
system-config-printer-gnome:
Installed: 1.4.2+20130920-0ubuntu1.2
Candidate: 1.4.2+20130920-0ubuntu1.2
Version table:
*** 1.4.2+20130920-0ubuntu1.2 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy-updates/main amd64 Packages
100 /var/lib/dpkg/status
1.4.2+20130920-0ubuntu1 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
libmono-system-servicemodel-routing4.0-cil:
Installed: (none)
Candidate: 2.10.8.1-5ubuntu2
Version table:
2.10.8.1-5ubuntu2 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
qemu-system-ppc64:
Installed: (none)
Candidate: (none)
Version table:
libmono-system-web-abstractions4.0-cil:
Installed: (none)
Candidate: 2.10.8.1-5ubuntu2
Version table:
2.10.8.1-5ubuntu2 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
libmono-system-xaml4.0-cil:
Installed: (none)
Candidate: 2.10.8.1-5ubuntu2
Version table:
2.10.8.1-5ubuntu2 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
liblua5.1-filesystem0:
Installed: (none)
Candidate: 1.5.0+16+g84f1af5-1
Version table:
1.5.0+16+g84f1af5-1 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/universe amd64 Packages
system-tools-backends:
Installed: (none)
Candidate: 2.10.2-1ubuntu1
Version table:
2.10.2-1ubuntu1 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/universe amd64 Packages
qemu-system-x86:
Installed: (none)
Candidate: 1.5.0+dfsg-3ubuntu5.3
Version table:
1.5.0+dfsg-3ubuntu5.3 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy-updates/main amd64 Packages
500 http://security.ubuntu.com/ubuntu/ saucy-security/main amd64 Packages
1.5.0+dfsg-3ubuntu5 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
system-config-printer-kde:
Installed: (none)
Candidate: (none)
Version table:
init-system-helpers:
Installed: 1.7
Candidate: 1.7
Version table:
*** 1.7 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
100 /var/lib/dpkg/status
systemd-shim:
Installed: 6-0ubuntu0.13.10
Candidate: 6-0ubuntu0.13.10
Version table:
*** 6-0ubuntu0.13.10 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy-updates/main amd64 Packages
100 /var/lib/dpkg/status
3+real-0ubuntu1 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
libghc-system-fileio-doc:
Installed: (none)
Candidate: 0.3.10-2build1
Version table:
0.3.10-2build1 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/universe amd64 Packages
systemtap-grapher:
Installed: (none)
Candidate: (none)
Version table:
libmono-system-enterpriseservices4.0-cil:
Installed: (none)
Candidate: 2.10.8.1-5ubuntu2
Version table:
2.10.8.1-5ubuntu2 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
libghc-system-filepath-dev-0.4.7-c7b27:
Installed: (none)
Candidate: (none)
Version table:
qemu-system-x86-64:
Installed: (none)
Candidate: (none)
Version table:
system-config-printer-udev:
Installed: 1.4.2+20130920-0ubuntu1.2
Candidate: 1.4.2+20130920-0ubuntu1.2
Version table:
*** 1.4.2+20130920-0ubuntu1.2 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy-updates/main amd64 Packages
100 /var/lib/dpkg/status
1.4.2+20130920-0ubuntu1 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
libsystem-command-perl:
Installed: (none)
Candidate: 1.09-1
Version table:
1.09-1 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/universe amd64 Packages
libboost-system1.42-dev:
Installed: (none)
Candidate: (none)
Version table:
qemu-system:
Installed: (none)
Candidate: 1.5.0+dfsg-3ubuntu5.3
Version table:
1.5.0+dfsg-3ubuntu5.3 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy-updates/main amd64 Packages
500 http://security.ubuntu.com/ubuntu/ saucy-security/main amd64 Packages
1.5.0+dfsg-3ubuntu5 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
systemtap-doc:
Installed: (none)
Candidate: 2.2.1-1ubuntu1
Version table:
2.2.1-1ubuntu1 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
libboost-system1.48-dev:
Installed: (none)
Candidate: (none)
Version table:
lua5.2-filesystem-dev:
Installed: (none)
Candidate: (none)
Version table:
system-config-kickstart:
Installed: (none)
Candidate: 2.5.20-0ubuntu22
Version table:
2.5.20-0ubuntu22 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
live-config-systemd:
Installed: (none)
Candidate: 3.0.23-1
Version table:
3.0.23-1 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/universe amd64 Packages
systemtap:
Installed: (none)
Candidate: 2.2.1-1ubuntu1
Version table:
2.2.1-1ubuntu1 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/universe amd64 Packages
libsystemd-login-dev:
Installed: (none)
Candidate: 204-0ubuntu19.1
Version table:
204-0ubuntu19.1 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy-updates/main amd64 Packages
204-0ubuntu18 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
x-window-system:
Installed: (none)
Candidate: (none)
Version table:
qemu-system-mips64el:
Installed: (none)
Candidate: (none)
Version table:
libsystemu-ruby-doc:
Installed: (none)
Candidate: 2.5.1-1
Version table:
2.5.1-1 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/universe amd64 Packages
xen-system-amd64:
Installed: (none)
Candidate: 4.3.0-1ubuntu1.3
Version table:
4.3.0-1ubuntu1.3 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy-updates/universe amd64 Packages
500 http://security.ubuntu.com/ubuntu/ saucy-security/universe amd64 Packages
4.3.0-1ubuntu1 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/universe amd64 Packages
qemu-system-sparc:
Installed: (none)
Candidate: 1.5.0+dfsg-3ubuntu5.3
Version table:
1.5.0+dfsg-3ubuntu5.3 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy-updates/main amd64 Packages
500 http://security.ubuntu.com/ubuntu/ saucy-security/main amd64 Packages
1.5.0+dfsg-3ubuntu5 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
xen-linux-system-686:
Installed: (none)
Candidate: (none)
Version table:
gnome-system-log:
Installed: 3.8.1-1svn1
Candidate: 3.8.1-1svn1
Version table:
*** 3.8.1-1svn1 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
100 /var/lib/dpkg/status
libmono-system4.0-cil:
Installed: (none)
Candidate: 2.10.8.1-5ubuntu2
Version table:
2.10.8.1-5ubuntu2 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
libqt5systeminfo5:
Installed: (none)
Candidate: 5.0~git20130712-0ubuntu3
Version table:
5.0~git20130712-0ubuntu3 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/universe amd64 Packages
libmono-system-xml-linq4.0-cil:
Installed: (none)
Candidate: 2.10.8.1-5ubuntu2
Version table:
2.10.8.1-5ubuntu2 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
qtdeclarative5-systeminfo-plugin:
Installed: (none)
Candidate: 5.0~git20130712-0ubuntu3
Version table:
5.0~git20130712-0ubuntu3 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/universe amd64 Packages
xen-system-i386:
Installed: (none)
Candidate: (none)
Version table:
libmono-system-configuration4.0-cil:
Installed: (none)
Candidate: 2.10.8.1-5ubuntu2
Version table:
2.10.8.1-5ubuntu2 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
libboost-system1.53-dev:
Installed: (none)
Candidate: 1.53.0-6+exp3ubuntu8
Version table:
1.53.0-6+exp3ubuntu8 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
qemu-system-m68k:
Installed: (none)
Candidate: (none)
Version table:
qemu-system-mips:
Installed: (none)
Candidate: 1.5.0+dfsg-3ubuntu5.3
Version table:
1.5.0+dfsg-3ubuntu5.3 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy-updates/main amd64 Packages
500 http://security.ubuntu.com/ubuntu/ saucy-security/main amd64 Packages
1.5.0+dfsg-3ubuntu5 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
libfsosystem-dbg:
Installed: (none)
Candidate: (none)
Version table:
libmono-system-numerics4.0-cil:
Installed: (none)
Candidate: 2.10.8.1-5ubuntu2
Version table:
2.10.8.1-5ubuntu2 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
libmono-system-data-services4.0-cil:
Installed: (none)
Candidate: 2.10.8.1-5ubuntu2
Version table:
2.10.8.1-5ubuntu2 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
qemu-system-i386:
Installed: (none)
Candidate: (none)
Version table:
qemu-system-misc:
Installed: (none)
Candidate: 1.5.0+dfsg-3ubuntu5.3
Version table:
1.5.0+dfsg-3ubuntu5.3 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy-updates/main amd64 Packages
500 http://security.ubuntu.com/ubuntu/ saucy-security/main amd64 Packages
1.5.0+dfsg-3ubuntu5 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
libghc-system-filepath-dev:
Installed: (none)
Candidate: 0.4.7-2build1
Version table:
0.4.7-2build1 0
500 http://ie.archive.ubuntu.com/ubuntu/ saucy/universe amd64 Packages
解决方法是，您可以自己直接重定向输出，而无需使用以下-f选项：
adb logcat > log
我猜该程序可能会更改它的工作目录，因此它试图log在您没有写访问权的地方创建。如果是这样，您还应该能够使用绝对路径使其工作：
adb logcat > /home/username/log
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我来说两句