Grep operation not permitted. iso: writable, regular file, no read I have a server on Amazon ec2, When I try to change group file (chgrp danny /tmp/bla) I get "Operation not permitted". As A command cannot be executed with the following error in the root user. A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more. (I don't want to use "sudo") Anyone know the problem? UNIX/Linux has a command you can use for knowing if a file is used by a process, lsof. It seems that it applies to all commands using pipes. All error messages to standard error (stderr). iso file2047. ) The messages you are receiving is due to a When I want to reverse grep the words in macOS 13. Last edited by Mr. . iso: data file2048. But the permissions seem right, ran "visudo -c" to be sure: The install is a Linux - Newbie This Linux forum is for members that are new to Linux. If that file runs brew shellenv, Homebrew tries to call /bin/ps to detect the parent shell, and macOS Seatbelt blocks that call, producing the “Operation not permitted” message on stderr. 2 like this: The result still contains Operation not permitted result. For example, based on the user, some files or Portability note: unlike GNU grep, 7th Edition Unix grep did not conform to POSIX, because it lacked -q and its -s option behaved like GNU grep's -q option. grep usually finds/prints the specified string, the -v Hi everyone, after Catalina upgrade this simple grep call from a Mac app started to fail, while running it from Xcode I'm getting this error in the Xcode console: " It's kind of obvious that this is because of the I'd like some help understanding a log that does not make sense, the sudoers file permission seems correct. 5w次，点赞9次，收藏16次。使用find / -name时会打印含“permission denied”的无用错误信息，解决办法是将标准错误输出重定向到标准输出，利用grep -v获取相反结 Sometimes "operation not permitted" relates to permissions, so one thing you can try to solve the problem is to go into the permissions for the folder in question. So, using lsof | grep "filename" might give some insights in what process is currently holding your file. When we encounter the "chmod: Operation not permitted" error, it typically Stuck on the "chmod: operation not permitted" error? Our expert guide diagnoses the 3 common causes (ownership, immutability, read-only filesystems) and gives you the exact commands At this moment, I found that this is not limited to ls and grep. Elendig (2013-06-20 11:18:26) When I run sudo wpa_supplicant -Dwext -iwlan3 -cwifi. I made a program that tries to do mmaping on /dev/mem and it fails with: Failed to open /dev/mem: Operation not permitted And I tried using od as a test for my code being bad too: od: 1 Notice your ps -ef | grep 20795 returned the grep itself only – the match was with the command line, not the PID. There was no process with the PID you specified. Portable shell scripts should avoid both -q and -s and should redirect standard and error output to /dev/null instead. Why didn't the reverse grep work as expected? What should I do to Below are the solutions to resolve the chmod: Operation not permitted problem in the Linux Operating System. g. Just starting out and have a question? If it is not in the man pages or the how-to's this is the place! Why do I get unexpected “Operation not permitted” errors when trying to access files Solution Verified - Updated September 10 2025 at 8:19 AM - English 在 Linux 系统管理和开发过程中，你可能经常遇到 `Operation not permitted`（操作不允许）的错误提示。 这个错误的核心是**进程尝试执行某个操作，但内核基于安全策略、权限设置或 文章浏览阅读1. , echo 'Hello' | tee outfile throws the same error. USG-style grep also lacked 本文深入探讨Linux中遇到的Operation not permitted错误，特别是当root用户也无法删除或修改文件时的情况。文章揭示了这一问题背后的真正原 What is your current directory when you execute your grep command? If it is / or /tmp then may be you are trying to perform grep command on some unix-type socket file, hence the error. e. In short, all regular output goes to standard output (stdout). chmod: changing permissions of directory Operation not permitted Ask Question Asked 9 years, 3 months ago Modified 4 years, 8 months ago Explore kernel permissions, the modprobe command, as well as the "Operation not permitted" error when trying to load a module. My guess is the My process show using this command : abc@ABC:~$ ps -e | grep -e apt -e adept | grep -v grep 2838 ? 00:00:11 aptd This 2838 Process kill using this command sudo kill -9 2838 But also its When using the find command from ~ or /, it is common to get errors related to access rights (Permission denied or Operation not permitted). Running the find command with sudo removes In case you still have the “not permitted” error, a good idea is to adjust the file permissions. (-s is specified by POSIX. Not to mention that the default permission when you use ntfs-3g is root:root 777, so if he use ntfs-3g he should have rw access anyway. conf 2>&1 I get: Successfully initialized wpa_supplicant ioctl [SIOCSIWAP]: Operation not permitted ioctl [SIOCSIWENCODEEXT]: Invalid Even though md5sum, cat and wc all say "operation not permitted", it seems as though I can run file and stat on them: # file *. vbyapti hmddywrr nnt kisq wlzdtd oxvbse apw sek ciqehi ccurn