The following error is reported when executing the yum command:
error: rpmdb: BDB0113 Thread/process 1309432/139989604449152 failed: BDB1507 Thread died in Berkeley DB library
error: db5 error(-30973) from dbenv->failchk: BDB0087 DB_RUNRECOVERY: Fatal error, run database recovery
error: cannot open Packages index using db5 - (-30973)
error: cannot open Packages database in /var/lib/rpm
Error: Error: rpmdb open failed
Solution:
cd /var/lib/rpm
rm -rf __db*
rpm --rebuilddb
Error in IOS when ionic is saved to the gallery plug-in error: method ‘requestauthorization:’ not defined in plugin ‘photolibrary’ error: method ‘xxx’ not defined in plugin
In IOS, when saving pictures to mobile photo album, the error is as follows
ERROR: Method 'requestAuthorization:' not defined in Plugin 'PhotoLibrary'
FAILED pluginJSON = ["PhotoLibrary815393554","PhotoLibrary","requestAuthorization",[{"write":true,"read":true}]]resolvent
cordova plugin rm cordova-plugin-photo-library
cordova plugin add https://github.com/nilebma/cordova-plugin-photo-library.gitDue to GitHub network problems, you can use the following command
npm install --save @ionic-native/photo-library
cordova plugin add https://gitee.com/liuzhuo8081/cordova-plugin-photo-library.gitERROR: Failed to Setup IP tables: Unable to enable SKIP DNAT rule: (iptables failed: iptables –wait -t nat -I DOCKER -i br-2add1a39bc5d -j RETURN: iptables: No chain/target/match by that name.
The reason for this is that docker needs to be restarted after the firewall is turned off.
service docker restart
When we install the ros-related packages or perform sudo apt-get update on a linux system with ros installed, the following error will occur:
Get:1 http://packages.ros.org/ros/ubuntu focal InRelease [4,676 B]
Hit:2 http://ports.ubuntu.com/ubuntu-ports focal InRelease
Hit:3 http://ports.ubuntu.com/ubuntu-ports focal-updates InRelease
Hit:4 http://ports.ubuntu.com/ubuntu-ports focal-backports InRelease
Err:1 http://packages.ros.org/ros/ubuntu focal InRelease
The following signatures were invalid: EXPKEYSIG F42ED6FBAB17C654 Open Robotics [email protected]
Hit:5 http://ports.ubuntu.com/ubuntu-ports focal-security InRelease
Fetched 4,676 B in 4s (1,078 B/s)
Reading package lists… Done
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://packages.ros.org/ros/ubuntu focal InRelease: The following signatures were invalid: EXPKEYSIG F42ED6FBAB17C654 Open Robotics [email protected]
W: Failed to fetch http://packages.ros.org/ros/ubuntu/dists/focal/InRelease The following signatures were invalid: EXPKEYSIG F42ED6FBAB17C654 Open Robotics [email protected]
W: Some index files failed to download. They have been ignored, or old ones used instead.
Why does this error occur?
ROS uses the debian package management system to distribute software, so it needs a GPG key to ensure the accuracy and authority of the package, usually the default key expires after about 2 years, so we need to add a new ros related key to it.
How to fix it
Download the certificate and add it.
curl -s https://raw.githubusercontent.com/ros/rosdistro/master/ros.key
sudo apt-key add ./ros.key
After the installation is successful, the log information of OK will be displayed.
$ sudo apt update
...
Get:15 http://packages.ros.org/ros/ubuntu focal InRelease [4,676 B]
...
Fetched 2,671 kB in 2s (1,607 kB/s)
Reading package lists… Done
Building dependency tree
Reading state information… Done
30 packages can be upgraded. Run 'apt list --upgradable' to see them.
Problem description
Write a shell script using vs code, but keep reporting errors:
syntax error near unexpected token `$’{\r’’
Solution:
Reference: syntax error near unexpected token in R
Convert the CRLF in the lower right corner of vs code to LF:
service network restart error
Job for network.service failed because the control process exited with error code. See “systemctl status
network.service” and “journalctl -xe” for details.
Solution:
systemctl stop NetworkManager
systemctl disable NetworkManage
service network restart
1. An error will be reported during apt install. The error content is: couldn’t resolve host mirrors aliyun.com
Cause of problem: the domain name resolution server needs to be configured because the domain name cannot be resolved.
Solution:
— vi /etc/resolv.conf
Add at the end of the text
nameserver 8.8.8.8
nameserver 114.114.114.1142.ubuntu Apt-get error
ubuntu use apt-get error：
E: Could not get lock /var/lib/dpkg/lock – open (11 Resource temporarily unavailable)
E: Unable to lock the administration directory (/var/lib/dpkg/) is another process using it?
Solution:
1.delete the lock file
sudo rm /var/lib/apt/lists/lock
2.delete the lock file in the cache directory
sudo rm /var/cache/apt/archives/lock
sudo rm /var/lib/dpkg/lock
3.ubuntu apt-get Unable to locate package
Reason:
Unable to locate packet Just can’t find the package
Solution:
— apt-get update
Error log
ld returned 1 exit status
The error reason
LD indicates that the link is wrong. The probability is that the linked library is not found or the library to be linked is not built first
Recently, this problem often occurs when using GIT. Google later said that the problem occurs in general libssh. Record
I solved this problem by using this command directly:
sudo apt-get -y install build-essential nghttp2 libnghttp2-dev libssl-dev
Error: configure: error: no acceptable C compiler found in $PATH
root@ubuntuserver4:/usr/local/pcre-8.01# sudo ./configure
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... /bin/mkdir -p
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking for gcc... no
checking for cc... no
checking for cl.exe... no
configure: error: in `/usr/local/pcre-8.01':
configure: error: no acceptable C compiler found in $PATH
See `config.log' for more details.
Solution: install GCC software suite
Method 1. Yum install GCC
method 2. Apt get install GCC
root@ubuntuserver4:~# apt-get install gcc
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
binutils cpp cpp-4.8 gcc-4.8 libasan0 libatomic1 libcloog-isl4
libgcc-4.8-dev libgmp10 libisl10 libitm1 libmpc3 libmpfr4 libquadmath0
libtsan0
Suggested packages:
binutils-doc cpp-doc gcc-4.8-locales gcc-multilib manpages-dev autoconf
automake1.9 libtool flex bison gdb gcc-doc gcc-4.8-multilib gcc-4.8-doc
libgcc1-dbg libgomp1-dbg libitm1-dbg libatomic1-dbg libasan0-dbg
libtsan0-dbg libquadmath0-dbg
The following NEW packages will be installed:
binutils cpp cpp-4.8 gcc gcc-4.8 libasan0 libatomic1 libcloog-isl4
libgcc-4.8-dev libgmp10 libisl10 libitm1 libmpc3 libmpfr4 libquadmath0
libtsan0
0 upgraded, 16 newly installed, 0 to remove and 171 not upgraded.
Need to get 14.5 MB of archives.
After this operation, 51.9 MB of additional disk space will be used.
Do you want to continue?[Y/n] y
WARNING: The following packages cannot be authenticated!
libasan0 libatomic1 libitm1 libquadmath0 libtsan0 binutils cpp-4.8
libgcc-4.8-dev gcc-4.8
Install these packages without verification?[y/N] y
Get:1 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main libasan0 amd64 4.8.4-2ubuntu1~14.04.4 [63.1 kB]
Get:2 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main libatomic1 amd64 4.8.4-2ubuntu1~14.04.4 [8,630 B]
Get:3 http://us.archive.ubuntu.com/ubuntu/ trusty/main libgmp10 amd64 2:5.1.3+dfsg-1ubuntu1 [218 kB]
Get:4 http://us.archive.ubuntu.com/ubuntu/ trusty/main libisl10 amd64 0.12.2-1 [419 kB]
Get:5 http://us.archive.ubuntu.com/ubuntu/ trusty/main libcloog-isl4 amd64 0.18.2-1 [57.5 kB]
Get:6 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main libitm1 amd64 4.8.4-2ubuntu1~14.04.4 [28.6 kB]
Get:7 http://us.archive.ubuntu.com/ubuntu/ trusty/main libmpfr4 amd64 3.1.2-1 [203 kB]
Get:8 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main libquadmath0 amd64 4.8.4-2ubuntu1~14.04.4 [126 kB]
Get:9 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main libtsan0 amd64 4.8.4-2ubuntu1~14.04.4 [94.8 kB]
Get:10 http://us.archive.ubuntu.com/ubuntu/ trusty/main libmpc3 amd64 1.0.1-1ubuntu1 [38.4 kB]
Get:11 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main binutils amd64 2.24-5ubuntu14.2 [2,076 kB]
Get:12 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main cpp-4.8 amd64 4.8.4-2ubuntu1~14.04.4 [4,452 kB]
Get:13 http://us.archive.ubuntu.com/ubuntu/ trusty/main cpp amd64 4:4.8.2-1ubuntu6 [27.5 kB]
Get:14 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main libgcc-4.8-dev amd64 4.8.4-2ubuntu1~14.04.4 [1,688 kB]
Get:15 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main gcc-4.8 amd64 4.8.4-2ubuntu1~14.04.4 [5,040 kB]
Get:16 http://us.archive.ubuntu.com/ubuntu/ trusty/main gcc amd64 4:4.8.2-1ubuntu6 [5,098 B]
Fetched 14.5 MB in 8s (1,771 kB/s)
Selecting previously unselected package libasan0:amd64.
(Reading database ... 60337 files and directories currently installed.)
Preparing to unpack .../libasan0_4.8.4-2ubuntu1~14.04.4_amd64.deb ...
Unpacking libasan0:amd64 (4.8.4-2ubuntu1~14.04.4) ...
Selecting previously unselected package libatomic1:amd64.
Preparing to unpack .../libatomic1_4.8.4-2ubuntu1~14.04.4_amd64.deb ...
Unpacking libatomic1:amd64 (4.8.4-2ubuntu1~14.04.4) ...
Selecting previously unselected package libgmp10:amd64.
Preparing to unpack .../libgmp10_2%3a5.1.3+dfsg-1ubuntu1_amd64.deb ...
Unpacking libgmp10:amd64 (2:5.1.3+dfsg-1ubuntu1) ...
Selecting previously unselected package libisl10:amd64.
Preparing to unpack .../libisl10_0.12.2-1_amd64.deb ...
Unpacking libisl10:amd64 (0.12.2-1) ...
Selecting previously unselected package libcloog-isl4:amd64.
Preparing to unpack .../libcloog-isl4_0.18.2-1_amd64.deb ...
Unpacking libcloog-isl4:amd64 (0.18.2-1) ...
Selecting previously unselected package libitm1:amd64.
Preparing to unpack .../libitm1_4.8.4-2ubuntu1~14.04.4_amd64.deb ...
Unpacking libitm1:amd64 (4.8.4-2ubuntu1~14.04.4) ...
Selecting previously unselected package libmpfr4:amd64.
Preparing to unpack .../libmpfr4_3.1.2-1_amd64.deb ...
Unpacking libmpfr4:amd64 (3.1.2-1) ...
Selecting previously unselected package libquadmath0:amd64.
Preparing to unpack .../libquadmath0_4.8.4-2ubuntu1~14.04.4_amd64.deb ...
Unpacking libquadmath0:amd64 (4.8.4-2ubuntu1~14.04.4) ...
Selecting previously unselected package libtsan0:amd64.
Preparing to unpack .../libtsan0_4.8.4-2ubuntu1~14.04.4_amd64.deb ...
Unpacking libtsan0:amd64 (4.8.4-2ubuntu1~14.04.4) ...
Selecting previously unselected package libmpc3:amd64.
Preparing to unpack .../libmpc3_1.0.1-1ubuntu1_amd64.deb ...
Unpacking libmpc3:amd64 (1.0.1-1ubuntu1) ...
Selecting previously unselected package binutils.
Preparing to unpack .../binutils_2.24-5ubuntu14.2_amd64.deb ...
Unpacking binutils (2.24-5ubuntu14.2) ...
Selecting previously unselected package cpp-4.8.
Preparing to unpack .../cpp-4.8_4.8.4-2ubuntu1~14.04.4_amd64.deb ...
Unpacking cpp-4.8 (4.8.4-2ubuntu1~14.04.4) ...
Selecting previously unselected package cpp.
Preparing to unpack .../cpp_4%3a4.8.2-1ubuntu6_amd64.deb ...
Unpacking cpp (4:4.8.2-1ubuntu6) ...
Selecting previously unselected package libgcc-4.8-dev:amd64.
Preparing to unpack .../libgcc-4.8-dev_4.8.4-2ubuntu1~14.04.4_amd64.deb ...
Unpacking libgcc-4.8-dev:amd64 (4.8.4-2ubuntu1~14.04.4) ...
Selecting previously unselected package gcc-4.8.
Preparing to unpack .../gcc-4.8_4.8.4-2ubuntu1~14.04.4_amd64.deb ...
Unpacking gcc-4.8 (4.8.4-2ubuntu1~14.04.4) ...
Selecting previously unselected package gcc.
Preparing to unpack .../gcc_4%3a4.8.2-1ubuntu6_amd64.deb ...
Unpacking gcc (4:4.8.2-1ubuntu6) ...
Processing triggers for man-db (2.6.7.1-1) ...
Setting up libasan0:amd64 (4.8.4-2ubuntu1~14.04.4) ...
Setting up libatomic1:amd64 (4.8.4-2ubuntu1~14.04.4) ...
Setting up libgmp10:amd64 (2:5.1.3+dfsg-1ubuntu1) ...
Setting up libisl10:amd64 (0.12.2-1) ...
Setting up libcloog-isl4:amd64 (0.18.2-1) ...
Setting up libitm1:amd64 (4.8.4-2ubuntu1~14.04.4) ...
Setting up libmpfr4:amd64 (3.1.2-1) ...
Setting up libquadmath0:amd64 (4.8.4-2ubuntu1~14.04.4) ...
Setting up libtsan0:amd64 (4.8.4-2ubuntu1~14.04.4) ...
Setting up libmpc3:amd64 (1.0.1-1ubuntu1) ...
Setting up binutils (2.24-5ubuntu14.2) ...
Setting up cpp-4.8 (4.8.4-2ubuntu1~14.04.4) ...
Setting up cpp (4:4.8.2-1ubuntu6) ...
Setting up libgcc-4.8-dev:amd64 (4.8.4-2ubuntu1~14.04.4) ...
Setting up gcc-4.8 (4.8.4-2ubuntu1~14.04.4) ...
Setting up gcc (4:4.8.2-1ubuntu6) ...
Processing triggers for libc-bin (2.19-0ubuntu6.9) ...
You can execute it after installation
root@ubuntuserver4:~# cd /usr/local/pcre-8.01/
root@ubuntuserver4:/usr/local/pcre-8.01# sudo ./configure
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... /bin/mkdir -p
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking for gcc... gcc
checking for C compiler default output file name... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables...
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
checking for style of include used by make... GNU
checking dependency style of gcc... gcc3
checking for g++... no
checking for c++... no
checking for gpp... no
checking for aCC... no
checking for CC... no
checking for cxx... no
checking for cc++... no
checking for cl.exe... no
checking for FCC... no
checking for KCC... no
checking for RCC... no
checking for xlC_r... no
checking for xlC... no
checking whether we are using the GNU C++ compiler... no
checking whether g++ accepts -g... no
checking dependency style of g++... none
checking how to run the C preprocessor... gcc -E
checking for grep that handles long lines and -e... /bin/grep
checking for egrep... /bin/grep -E
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking for int64_t... yes
checking for a BSD-compatible install... /usr/bin/install -c
checking build system type... x86_64-unknown-linux-gnu
checking host system type... x86_64-unknown-linux-gnu
checking for a sed that does not truncate output... /bin/sed
checking for fgrep... /bin/grep -F
checking for ld used by gcc... /usr/bin/ld
checking if the linker (/usr/bin/ld) is GNU ld... yes
checking for BSD- or MS-compatible name lister (nm)... /usr/bin/nm -B
checking the name lister (/usr/bin/nm -B) interface... BSD nm
checking whether ln -s works... yes
checking the maximum length of command line arguments... 1572864
checking whether the shell understands some XSI constructs... yes
checking whether the shell understands "+="... yes
checking for /usr/bin/ld option to reload object files... -r
checking for objdump... objdump
checking how to recognize dependent libraries... pass_all
checking for ar... ar
checking for strip... strip
checking for ranlib... ranlib
checking command to parse /usr/bin/nm -B output from gcc object... ok
checking for dlfcn.h... yes
checking for g++... no
checking for c++... no
checking for gpp... no
checking for aCC... no
checking for CC... no
checking for cxx... no
checking for cc++... no
checking for cl.exe... no
checking for FCC... no
checking for KCC... no
checking for RCC... no
checking for xlC_r... no
checking for xlC... no
checking whether we are using the GNU C++ compiler... (cached) no
checking whether g++ accepts -g... (cached) no
checking dependency style of g++... (cached) none
checking for objdir... .libs
checking if gcc supports -fno-rtti -fno-exceptions... no
checking for gcc option to produce PIC... -fPIC -DPIC
checking if gcc PIC flag -fPIC -DPIC works... yes
checking if gcc static flag -static works... yes
checking if gcc supports -c -o file.o... yes
checking if gcc supports -c -o file.o... (cached) yes
checking whether the gcc linker (/usr/bin/ld -m elf_x86_64) supports shared libraries... yes
checking whether -lc should be explicitly linked in... no
checking dynamic linker characteristics... GNU/Linux ld.so
checking how to hardcode library paths into programs... immediate
checking whether stripping libraries is possible... yes
checking if libtool supports shared libraries... yes
checking whether to build shared libraries... yes
checking whether to build static libraries... yes
checking whether ln -s works... yes
checking for ANSI C header files... (cached) yes
checking limits.h usability... yes
checking limits.h presence... yes
checking for limits.h... yes
checking for sys/types.h... (cached) yes
checking for sys/stat.h... (cached) yes
checking dirent.h usability... yes
checking dirent.h presence... yes
checking for dirent.h... yes
checking windows.h usability... no
checking windows.h presence... no
checking for windows.h... no
checking for alias support in the linker... no
checking for alias support in the linker... no
checking string usability... no
checking string presence... no
checking for string... no
checking bits/type_traits.h usability... no
checking bits/type_traits.h presence... no
checking for bits/type_traits.h... no
checking type_traits.h usability... no
checking type_traits.h presence... no
checking for type_traits.h... no
checking for srtoq... no
checking for strtoll... no
checking for _strtoi64... no
checking for strtoimax... no
checking for an ANSI C-conforming const... yes
checking for size_t... yes
checking for bcopy... yes
checking for memmove... yes
checking for strerror... yes
checking zlib.h usability... yes
checking zlib.h presence... yes
checking for zlib.h... yes
checking for gzopen in -lz... yes
checking bzlib.h usability... no
checking bzlib.h presence... no
checking for bzlib.h... no
checking for libbz2... no
checking readline/readline.h usability... no
checking readline/readline.h presence... no
checking for readline/readline.h... no
checking readline/history.h usability... no
checking readline/history.h presence... no
checking for readline/history.h... no
checking for readline in -lreadline... no
configure: creating ./config.status
config.status: creating Makefile
config.status: creating libpcre.pc
config.status: creating libpcreposix.pc
config.status: creating libpcrecpp.pc
config.status: creating pcre-config
config.status: creating pcre.h
config.status: creating pcre_stringpiece.h
config.status: creating pcrecpparg.h
config.status: creating config.h
config.status: executing depfiles commands
config.status: executing libtool commands
config.status: executing script-chmod commands
config.status: executing delete-old-chartables commands
pcre-8.01 configuration summary:
Install prefix .................. : /usr/local
C preprocessor .................. : gcc -E
C compiler ...................... : gcc
C++ preprocessor ................ :
C++ compiler .................... : g++
Linker .......................... : /usr/bin/ld -m elf_x86_64
C preprocessor flags ............ :
C compiler flags ................ : -O2
C++ compiler flags .............. :
Linker flags .................... :
Extra libraries ................. :
Build C++ library ............... : yes
Enable UTF-8 support ............ : no
Unicode properties .............. : no
Newline char/sequence ........... : lf
\R matches only ANYCRLF ......... : no
EBCDIC coding ................... : no
Rebuild char tables ............. : no
Use stack recursion ............. : yes
POSIX mem threshold ............. : 10
Internal link size .............. : 2
Match limit ..................... : 10000000
Match limit recursion ........... : MATCH_LIMIT
Build shared libs ............... : yes
Build static libs ............... : yes
Link pcregrep with libz ......... : no
Link pcregrep with libbz2 ....... : no
Link pcretest with libreadline .. : no
I don’t know if you have encountered an error when
docker deletes the container image
docker RMI container image ID
Details of error reporting:
Error response from daemon: conflict: unable to delete 7cc1942f1ed5 (must be forced) – image is referenced in multiple repositories
Solution:
First docker PS - a
see several containers with the same image ID. what the hell, There must be a mistake during the construction, and then stop the container using the container image (if it has stopped, please go to the next step)
docker stop the ID of the container using the container image and RM drop
docker RM the ID of the container using the container image and
docker RMI the container image ID
Discovery or error
Well, the ultimate solution (that’s the point of this article)
docker rmi -f This container image ID
It is the above command with the – f parameter that forcibly deletes all container images with the container image ID
About network programming, the server-client bind error: address already in use:
reason:
1. You used the port number, but the process did not exist.
2. At the end of the process:
crtl +c And crtl + Z are different. The former ends the process and the latter suspends the process
If you use the latter, the process will hang and not be killed
Solution:
1. Kill the process
PS – Aue view PID ， Then kill + process PID and kill the process
2. Change the port number
3. Wait half a minute until the port is released
4. External parameter transmission
It is more convenient to directly change the new port number than 2
5. Use the setsockopt() function to cancel the port number binding restriction
int on=1;
setsockopt(fd,SOL_ SOCKET,SO_ REUSEADDR,& on,sizeof(on));