12-26-2017
A string in *nix is a sequence of (not necessarily printable) characters terminated by a null (0x00) character.
xargs usually collects lines read from stdin into one or more long (influenced by several options) parameter lists and executes the command / utility one or more times with the respective parameter list. With the -I option you can define where in that command execution the data from stdin show up. I'd recommend you do some exercises and testing with some innocuous commands and the -t (verbose) option.
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1. UNIX for Dummies Questions & Answers
Can I use xargs to send a list of commands to a process, to be acted upon individually? Here's what I have: a file that contains numbers, one per line. The desired outcome it to send each number to a DB2 query. I thought xargs would work, but it doesn't. I tried it like this:
cat file | xargs |... (4 Replies)
Discussion started by: jpprial
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2. UNIX for Advanced & Expert Users
I discovered that GNU's xargs has a -P option to allow its processes to run in parallel. Great! Is this a GNU thing, or is it supported by other platforms as well? (4 Replies)
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3. Shell Programming and Scripting
hi
i just want to know that how do we use xargs command to find files which are greater than specified memory
in a given directory (6 Replies)
Discussion started by: sumit the cool
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4. Shell Programming and Scripting
Hi,
I have a requirement to RCP the files from remote server to local server.
Also the RCP has to run in parallel. However using 'xargs' retrives 2 file names during each loop. How do we restrict to only one file name using xargs and loop till remaining files.
I use the below code for... (2 Replies)
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5. Shell Programming and Scripting
Hello there,
Let me show you a simple example of what I am trying to achieve:
1) I have an input text file with some lines:
1 a
2 b
3 c
2) And I want to run a command with these lines as arguments (+ arbitrary extra arguments). For example:
$ command "1 a" "2 b" "3 c" "bye"
I... (7 Replies)
Discussion started by: tokland
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6. Shell Programming and Scripting
hi
Could any one please tell me the option using which we can run multiple commands using xargs
I have list of files, I want to run dos2unix and chmod at one shot on them
I tried google n searched man pages but couldnt really find the solution , please help
right now im doing this
ls... (4 Replies)
Discussion started by: sunilmenhdiratt
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7. Shell Programming and Scripting
I have dir with many files ( close to 4M ) .
$ ls -la
total 76392
drwxr-xr-x 10 oracle dba 512 Jun 06 14:39 .
drwxr-xr-x 11 oracle dba 512 Dec 20 13:21 ..
drwxr-xr-x 2 oracle dba 39074816 Jun 15 14:07 ad
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8. Shell Programming and Scripting
Using the bash shell I'm trying to either create a command for the command line or a script that will show netstat info for a given process name. Here is an example of what I'm trying to do:$ ps aux |grep catalina |grep -v grep | awk '{print $2}'
5132
$ netstat -nlp |grep 5132
(Not all processes... (11 Replies)
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9. Shell Programming and Scripting
Hello, I need some help with xargs
$ ls
aaa bbb ccc ddd$ ls | xargs -I{} ls -la {}
-rw-rw-r--. 1 xxx xx 0 May 30 20:04 aaa
-rw-rw-r--. 1 xxx xx 0 May 30 20:04 bbb
-rw-rw-r--. 1 xxx xx 0 May 30 20:04 ccc
-rw-rw-r--. 1 xxx xx 0 May 30 20:04 dddit's possible to have output like this with... (3 Replies)
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10. UNIX for Dummies Questions & Answers
Hi,
can anyone tell me in detail ?
what the following do in detail ?
I am trying to get a largest number in a list
Thanks
Tao
LARGEST=$(echo $* | xargs -n1 | sort -nr | tail -1) (3 Replies)
Discussion started by: ccp
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LEARN ABOUT CENTOS
git-check-ignore
GIT-CHECK-IGNORE(1) Git Manual GIT-CHECK-IGNORE(1)
NAME
git-check-ignore - Debug gitignore / exclude files
SYNOPSIS
git check-ignore [options] pathname...
git check-ignore [options] --stdin < <list-of-paths>
DESCRIPTION
For each pathname given via the command-line or from a file via --stdin, show the pattern from .gitignore (or other input files to the
exclude mechanism) that decides if the pathname is excluded or included. Later patterns within a file take precedence over earlier ones.
OPTIONS
-q, --quiet
Don't output anything, just set exit status. This is only valid with a single pathname.
-v, --verbose
Also output details about the matching pattern (if any) for each given pathname.
--stdin
Read file names from stdin instead of from the command-line.
-z
The output format is modified to be machine-parseable (see below). If --stdin is also given, input paths are separated with a NUL
character instead of a linefeed character.
OUTPUT
By default, any of the given pathnames which match an ignore pattern will be output, one per line. If no pattern matches a given path,
nothing will be output for that path; this means that path will not be ignored.
If --verbose is specified, the output is a series of lines of the form:
<source> <COLON> <linenum> <COLON> <pattern> <HT> <pathname>
<pathname> is the path of a file being queried, <pattern> is the matching pattern, <source> is the pattern's source file, and <linenum> is
the line number of the pattern within that source. If the pattern contained a ! prefix or / suffix, it will be preserved in the output.
<source> will be an absolute path when referring to the file configured by core.excludesfile, or relative to the repository root when
referring to .git/info/exclude or a per-directory exclude file.
If -z is specified, the pathnames in the output are delimited by the null character; if --verbose is also specified then null characters
are also used instead of colons and hard tabs:
<source> <NULL> <linenum> <NULL> <pattern> <NULL> <pathname> <NULL>
EXIT STATUS
0
One or more of the provided paths is ignored.
1
None of the provided paths are ignored.
128
A fatal error was encountered.
SEE ALSO
gitignore(5) gitconfig(5) git-ls-files(5)
GIT
Part of the git(1) suite
Git 1.8.3.1 06/10/2014 GIT-CHECK-IGNORE(1)