1/16/2024 0 Comments Exec grep wildcard![]() we would have gotten the desired result of deleting only files that dont end with the. If the command was re-written to enclose the wildcard in single quotes like this: find. have the same value per index to execute queries more efficiently. The key problem here is the lack of quoting around the wildcard used to specify the file extension. Maybe this is just me! And if by default it executed this command on a max of 5 containers in parallel by default it would be ideal for my common use case. The wildcard type is optimized for fields with large values or high cardinality. Just an idea, I know I would find this quite useful. It would be useful if docker supported this.įor example say I have 10 containers running:ĬONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMESīc2c540d224b el632-build "linux32 init" About a minute ago Up 55 seconds crash7ġbe1d003b13c el632-build "linux32 init" 8 minutes ago Up 8 minutes crash6Ĥ80dbd255045 el632-build "linux32 init" 13 minutes ago Up 13 minutes crash5ġ70431727bf4 el632-build "linux32 init" 18 minutes ago Up 18 minutes crash4ĭe9cbc1c1f06 el632-build "linux32 init" 22 minutes ago Up 22 minutes crash3Ħ8dfa15d4f4e el632-build "linux32 init" 27 minutes ago Up 27 minutes crash2ĭ0cf29ae6228 el632-build "linux32 init" 31 minutes ago Up 31 minutes crash1ħba320f34897 el632-build "linux32 init" 36 minutes ago Up 36 minutes crash0Īnd it would run on all ten containers. You can grep multiple strings in different files and directories. By using the grep command, you can customize how the tool searches for a pattern or multiple patterns in this case. The name stands for Global Regular Expression Print. I can achieve this via ansible kinda but it is not ideal. Introduction Grep is a powerful utility available by default on UNIX-based systems. find one or more of any character.Sometimes I find if I have 10 containers running I find I want to run a command on all containers while they are running. * as previously mentioned - the dot is a wildcard character, and the star, when modifying the dot, means find one or more dot ie. If you want * in regular expressions to act as a wildcard, you need to use. However, in regular expressions, * is a modifier, meaning that it only applies to the character or group preceding it. ![]() Note also that these wildcards can be used in other commands as well like in cp for example. grep -E fatalerrorcriticalfailurewarning file1,2.log. The wildcard isnt necessary to be at the end so flickerflys answer can be simplified to. In the console, * is part of a glob construct, and just acts as a wildcard (for instance ls *.log will list all files that end in. grep whatever product.log.5-7 will grep for all files ending with product.log. Finally, note that you need to quote the regex. Note that some grep s (like GNU grep) won't require -E for this example to work. If you want to grep using more advanced regex, use -E (use extended regex): grep -E 'directory 1-3' file.txt. name 'WSFY321.c' But I do not know the case, it could be uppercase, lowercase, or a mix of bot. Example 1: Grep for test string under any symlinks and file under /tmp/dir. Grep recursively for files with symbolic links. Example 2: Grep for multiple strings in single file. ![]() Example 1: Grep multiple patterns inside directories and sub-directories. * in a regular expression is not exactly the same as * in the console. grep -F 'directory1 directory2 director圓' file.txt. I am looking for file 'WSFY321.c' in a huge directory hierarchy. Grep for multiple patterns with recursive search. If you want to just match abc, you could just say grep 'abc' myFile. * - the dot means any character ( within certain guidelines). If you want to match anything, you need to say. *abc*/ matches a string containing ab and zero or more c's (because the second * is on the c the first is meaningless because there's nothing for it to repeat). will only show lines containing all three, but in any order. If the items can be in any order, you can try a pipe: cat file.txt grep package grep el6 grep x8664. using wildcard matching a name suffix is either the whole name, or a trailing. If theyre guarenteed to be in order, then a simple grep: grep '8664' file.txt. ![]() This command will run tail /var/log/date.log on the container-name container, and output the results. The asterisk is just a repetition operator, but you need to tell it what you repeat. Typically PATTERNS should be quoted when grep is used in a shell command. If you need to run a command inside a running Docker container, but don’t need any interactivity, use the docker exec command without any flags: docker exec container-name tail /var/log/date.log. Will match a string that contains abc followed by def with something optionally in between. ![]()
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