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Geany run script12/8/2023 ![]() When you have a freshly installed Ubuntu system, the cache is empty. If the package is not in this cache, your system won’t be able to install it. When you use the install command, apt package manager searches the cache to get the package and version information and then downloads it from its repositories over the network. ![]() Basically, the ‘apt update’ command builds a local cache of available packages. I recommend to get through the concept of Ubuntu repositories. This command won’t update Ubuntu straightaway. If this is the first time you are using your system after installing, you should run the update command: sudo apt update And that's numeric 1, not the letter L in small cases. With Snap, VS Code package is named code, not vscode.Ī practical example is installing zlib package on Ubuntu. In Ubuntu, Docker package is docker.io because docker was an existing package. Remember that the installable package name could be different than the popular software name. For example, the command name should be vlc, not Vlc or VLC. So make sure that you are typing the correct package name. Typos are common, so make sure you have not made any mistakes in typing the package's name.Īlso, the commands in Linux are case-sensitive. Typos are one of the main reasons behind 'package not found error' Did you make a typo in the package name? I mean, if you are trying to install vlc and you typed vcl, it will surely fail. Let’s see how to troubleshoot this issue one step at a time. Fixing ‘Unable to locate package error’ on Ubuntu But why is it so? Why can it not find the package? Let’s see some of the actions you can take to fix this issue. Your Linux system cannot find the package that you are trying to install. The error reads: sudo apt-get install package_name Sometimes, you may encounter an error while trying to install application in this manner. You open a terminal and use the program name to install it like this: sudo apt install package_name ![]() (The name stands for ``text file busy''.One of the many ways of installing software in Ubuntu is to use the apt-get or the apt command. Often using aĭebugger to run a program is considered having it open for writing and Write to a file that is currently being executed. Sysdeps/mach/hurd/bits/errno.h:62: ETXTBSY = 0x4000001a, /* Text file busy */Īnd a manual hit in manual/errno.texi: Macro int 26, Text file busy}Īn attempt to execute a file that is currently open for writing, or Pathname refers to an executable image which is currently being executed and write access was requested.Ī quick grep on 2.30 gives: sysdeps/gnu/errlist.c:299: = N_("Text file busy"), The file is a pure procedure (shared text) file that is being executed and oflag is O_WRONLY or O_RDWR. The reason it does not fail is that when you unlink and re-write the file, it creates a new inode, and keeps a temporary dangling inode for the running executable file.īut if you just write without unlink, then it tries to write to the same protected inode as the running executable. openat(AT_FDCWD, "sleep.out", O_RDWR|O_CREAT|O_TRUNC, 0666) = 3 sleep.c |& grep sleep.outĬontains: unlink("sleep.out") = 0 That does not generate an error, even though the second gcc call is writing to sleep.out.Ī quick strace shows that GCC first unlinks before writing: strace -f gcc -std=c99 -o sleep.out. This explains why it works for certain programs but not others. ![]() Then compile and run analogously to the above, and those asserts pass. The error does not happen if you unlink firstĪssert(open("sleep.out", O_WRONLY|O_CREAT) != -1) Tested on Ubuntu 18.04, Linux kernel 4.15.0. Which contains: openat(AT_FDCWD, "sleep.out", O_WRONLY) = -1 ETXTBSY (Text file busy) Makes Bash output: -bash: sleep.out: Text file busyįor a more complex application, you can also observe it with strace: strace. So we deduce that the message is hardcoded in glibc itself. sleep.cīusy.out passes the asserts, and perror outputs: Text file busy Int ret = open("sleep.out", O_WRONLY|O_TRUNC) Ĭompile and run: gcc -std=c99 -o sleep.out. I recommend understanding the underlying API to better see what is going on. Minimal runnable C POSIX reproduction example ![]()
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