I have created symbolic links to several frequently used commands, for example:
"lt" is a link to "ls -ltrgo|tail". What can I do to make these links available system-wide, or at least in the directories my coworkers are in most of the time? I have copied the link to several directories, and... (6 Replies)
Hi, I have a task to search for a file called 'Xstartup' in the whole system because there might be different versions of it which overrite eachother.
Can anyone suggest a smart command to run this search ? The machine needs to scan every single folder beginning from root.
Please help, I am... (5 Replies)
Hello,
I am new to shell scripting and I was trying to write a script that would force a system wide password change except for admins. I am having some trouble and any help that someone could give me would be greatly appreciated. I am trying to do it by using the UID as the marker for anyone... (6 Replies)
Hi all,
Is there any system wide limit on number of user threads. I only find nkthread as a tunable parameter,apart from the `per process limit`. (1 Reply)
Hi,
I need to look for a config file (ldap.conf) and pick the latest modified file.
`locate` tells me there are many ldap.conf's, some in /etc, /usr, /home, etc.
Is there some way I can sort them by last modified time via bash?
I was thinking maybe I could pipe the output of `locate` to `ls... (4 Replies)
Dear Fellows;
As being new to linux, i have tried to synamically load a custom library which overrides some system calls like conncet(), socket() etc.... for custom purposes.
It works well, if declaring the environment path LD_PRELOAD and execution of the application to be override... (0 Replies)
We need to have many of our users all send encrypted files to a single FTP server. The problem, if I understand how encryption/decryption works (which I don't), is that each user would normally have their own private and public key. The other end needs to be able to decrypt the file(s) using a... (6 Replies)
When looking for wherever a program or a filename appears in the system, a short scrip is "findinner" which another script calls with a long parameter list consisting of path names ending with ".sh" or ".menu". "findinner" looks like this:
# If not .savenn file, show name and result of grep.
#... (4 Replies)
I have downloaded and installed a library called htslib for specific bioinformatic use but not for the system (I'm using Ubuntu 18.04). Only parts of the library is needed for my exercise to parse data in a type called VCF format (basically tab-delimited file but contains many information in... (14 Replies)
Discussion started by: yifangt
14 Replies
LEARN ABOUT OSF1
umask
umask(2) System Calls Manual umask(2)NAME
umask - Sets and gets the value of the file creation mask
SYNOPSIS
#include <sys/types.h>
#include <sys/stat.h>
mode_t umask ( mode_t cmask );
STANDARDS
Interfaces documented on this reference page conform to industry standards as follows:
umask(): POSIX.1, XPG4, XPG4-UNIX
Refer to the standards(5) reference page for more information about industry standards and associated tags.
PARAMETERS
Specifies the value of the file mode creation mask.
DESCRIPTION
The umask() function sets the file mode creation mask of the process to the value of the cmask parameter and returns the previous value of
the mask. The cmask parameter is constructed by logically ORing file permission bits defined in the sys/mode.h header file.
Whenever a file is created (by the open(), mkdir(), or mknod() function), all file permission bits set in the file mode creation mask are
cleared in the mode of the created file. This clearing lets users restrict the default access to their files.
The mask is inherited by child processes.
RETURN VALUES
Upon successful completion, the previous value of the file mode creation mask is returned.
RELATED INFORMATION
Commands: chmod(1), mkdir(1), Bourne shell sh(1b), POSIX shell sh(1p), umask(1)
Functions: chmod(2), mkdir(2), mknod(2), open(2), stat(2)
Standards: standards(5)
delim off
umask(2)