All Questions
1,500
questions
0
votes
0
answers
19
views
Sending Environment Variables via SCP
I'm looking to send some kind of environment variable using "SCP -o" (or any other file transfer protocol for that matter PSFTP, PSCP, etc).
I currently use SCP to transfer files between ...
- 1
0
votes
0
answers
13
views
"find" command does not find all files from root unless folder is specified [duplicate]
I am trying to find the files that are named setenv.sh on this machine, I am logged in as root and am searching from the '/' using the following syntax and receiving the output:
# First
[root@...
0
votes
1
answer
127
views
How do I find files by last day in a month? (or how to copy the latest file per month)
I know there is "find" and I use something like find "/backup.stats/30days" -mtime +30 -type f But I wanted to know if anyone knew of a way to pick out the oldest file by month; ...
- 25
1
vote
0
answers
66
views
How to let root use sudoedit as if it was a user?
I'm writing a wrapper for myself around vim that detects when the user's trying to edit a file that doesn't belong to them, and suggests sudoedit or visudo instead. I want to use sudoedit rather than ...
- 11
1
vote
0
answers
56
views
How to detox filenames in a bash script with no errors posted?
OS: Kubuntu 22.04.4 LTS x86_64
detox 1.4.5
To display above:
neofetch --stdout |grep 'OS:'
detox -V
Here is a toxic filename, starts with s1:
s1 Ä Ö Ü - ä ö ü Science & < > " 1 \ 2 ⁄ 3 ...
- 367
2
votes
1
answer
51
views
How can I use the last changed file as an argument in linux?
I'm thinking of using the last changed file as an argument to commands like ls, echo, or cat, is there a simple and efficient way? this question arose when I was faced with analyzing the latest log ...
- 21
3
votes
1
answer
613
views
What is the meaning of the manage-gids parameter in /etc/nfs.conf?
I have run into an issue (on a system which I am not root) where there is a directory using an acl to manage access, I should be allowed access (and I am allowed access if I do a newgrp to one of the ...
- 33
1
vote
1
answer
224
views
Is there a trick to add an unix user with '@' inside its login on debian
On Debian, there is not a lot of limitations to add an unix user. Ie: the login may contain dots and uppercase letters.
Is there a trick to add an unix user with an '@' inside its login ? I understand ...
- 13
1
vote
1
answer
327
views
Shell command to tar directory excluding certain folders
In Bash 4, I want make a tar.gz with excluded folders, and while tons of answers about this simple case exist, nothing works in my case.
I would like to keep the directory mentioned in exclude, ...
- 13
0
votes
0
answers
121
views
what does ARG_MAX mean when I run a script?
Up to now I know what ARG_MAX means (thanks to EdMorton):
ls foo bar
The command is ls and it has three arguments: foo, and bar. It's 7 characters, so the arguments of ls in here is 7.
Now let's ...
- 423
0
votes
1
answer
860
views
tail -f nohup.out gives cannot open 'nohup.out' for reading: No such file or directory
I connected to a remote server using ssh protocol and launched this command in order to run my python script remotely:
nohup python3.8 -u sab.py > log_15_09_2023.txt &
This works fine since if ...
- 111
0
votes
0
answers
70
views
Unable to add DNS into the ignore host Network Proxy Preferences Linux
I have internal DNS ( let say it example.com ),
I’m unable to add this DNS into the ignore host Network Proxy Preferences, due to the Amazon Linux AWS workspaces key not writable. As a result, not ...
- 1
0
votes
1
answer
326
views
Connection refused PuTTY to VMWare workstation guest Rocky Linux
I have Windows 10 Pro, in which VMWare Workstation 16 is installed. The guest system I use there is Rocky Linux 8.8.
The problem I’m getting Connection refused PuTTY to VMWare workstation guest OS ...
0
votes
1
answer
2k
views
Unix: zip folder ignoring folder structure and excluding a subdirectory
I want to create a zip ignoring the folder structure, and excluding the content of a specific subfolder.
I have tried:
zip -rj /path/to/target.zip /path/to/source -x "/path/to/source/subfolder/*&...
- 141
0
votes
1
answer
341
views
Why UNIX socket files end with and equal sign in ls?
When I list (ls) files in directory, I see the equal sign = after some files. All these files in my case are UNIX domain socket files:
user@Debian11:~/src/unix_sock$ l
a.out* cli_stream* ...
- 195
0
votes
2
answers
48
views
Does the unix words file change over time or between systems? [closed]
Is the Unix "words" file (e.g at /usr/share/dict/words) pretty standard? I.e, can I generally rely on, for example, the 200th word in the file to be the same word between a fedora and an ...
- 365
0
votes
1
answer
3k
views
SSH to AWS EC2 instance hangs
I was able to log in to my ec2 instance via ssh few days ago. But somehow today when I connected it with
ssh -i something.pem ubuntu@ip_address -v
then the terminal hung on this line:
debug1: Local ...
- 103
0
votes
0
answers
94
views
Problem while trying to create a new virtual machine
I am trying to install a virtual machine in my computer, I have windows 10. I installed virtual box and I created a new machine, when I try to start the machine, it says : unpacking failed: write ...
mimi
1
vote
1
answer
983
views
Unix/Linux "shutdown": How to prevent wall message and terminal blocking?
I'm making a script that adds a layer of functionality on top of the shutdown command. It's intended to schedule a shutdown a while into the future, and sends out it's own wall message.
How do I ...
Steam Ranger
0
votes
0
answers
110
views
Why are not all my files included when I gzip a directory?
I know this is a question that has been asked before, for example here Recursively count all the files in a directory,
but this is driving me crazy. Let me explain:
I have a directory called "...
- 101
0
votes
1
answer
775
views
setfacl: How to give user permission to a dir for existing and future files?
OS: debian:bullseye (docker image).
What I am trying to do:
I have a websockets server that creates a unix socket and listens on it. I am trying to set up nginx in front of this. I am trying to set up ...
- 1
0
votes
0
answers
109
views
Batch file using WinSCP won't execute UNIX shell script that assigns variables to output of "more" command
I am working with a Batch script that uses WinSCP to transfer files from an UNIX machine to a windows machine.
To achieve this, WinSCP has to call shell scripts on the UNIX side.
There is one shell ...
- 1
0
votes
1
answer
294
views
Need to iterate Backwards in a linux/unix path
I have a script that would have multiple paths (folder names).
Each folder path would have a Dockerfile, but its uncertain at what level that file would exist.
Lets say my path is "v1/airflow/1....
- 101
4
votes
0
answers
2k
views
Understanding MCE errors on Linux
I got an MCE hardware error on Linux. I used rasdaemon to log all errors. Here is what ras-mc-ctl --errors prints me
41 2023-01-03 10:50:51 +0100 error: Corrected error, no action required., CPU 2, ...
- 41
1
vote
1
answer
34
views
Linux, centos, resetting password
While resetting password after commands:
rd.break
mount -o remount,rw /sysroot
chroot /sysroot
I entered new password all done correctly at the end created file reliably using
touch /.autorelable ...
0
votes
1
answer
54
views
vim create a binding so that pressing "Shift I I" writes python import statements
I want to create a binding so that pressing "Shift I I" writes python import statements.
I think it should be a map, like this:
:map <S-i><S-i> ...
I'm not sure how to map my ...
- 650
1
vote
1
answer
2k
views
How to send and receive an UNIX datagram with socat?
I need to send a UNIX datagram to an open port in a running application with socat. When the application receives the datagram, it will answer back with another.
I need to do this to get the resulting ...
- 31
0
votes
1
answer
742
views
UNIX or Linux sort: only sort on the first part of an entry
I'm working on a complicated grep, something like grep -E -i "first|next" *.txt, and I get results like:
logs.10.txt:2022-10-07 10:33:05.6673 | ClassName | [Info] | Inside function first(), ...
- 2,281
0
votes
1
answer
35
views
Is it defined to use pax across filesystems?
If I wanted to backup a *nx system, am I correct that going across filesystem boundaries would be a no-no? Would utilities like pax properly handle the jump across them or do I avoid it? If avoid it,...
- 612
0
votes
1
answer
131
views
Output to stdout and external txt file
I am trying to redirect the stdout of a particular output to a txt file, however I would still like to view it in the console log
tail -f /var/log/kern.log | ./prsfwlog -f elfs/prs_log.elf | \
grep -E ...
- 1
-1
votes
1
answer
715
views
Recover data from broken wd hard disk by replacing the head
I have a broken wd hard disk, see this link for the detail status:
How to use dd to backup "WD My Passport" on Ubuntu
Because it is not allowed to ask more than one question in the same post,...
- 123
0
votes
1
answer
408
views
How to use dd to backup "WD My Passport" on Ubuntu
My "WD My Passport" has problem when connecting to Windows 10, it may have hardware error.
I have set a password for the "WD My Passport" with WD Security long time ago.
Windows ...
- 123
1
vote
2
answers
3k
views
Cannot boot Qubes after successful installation
There is a problem with booting Qubes 4.1.1 after installation marked by installer as successful. The validity of the image is confirmed and hardware requirements should be passed.
SETUP [docs]
Intel ...
0
votes
2
answers
1k
views
Setting environment variables using eval - by calling other shell script
I have two shell scripts Caller and getGlobalParameters.
There is a function defined in the getGlobalParameters script which calls a java class and uses the values returned by the java class to set ...
0
votes
0
answers
204
views
How to encrypt files so that root cannot view them?
I have a powerful linux server with lots of CPU+RAM which sits around idle 99% of the day.
I have a friend who has some financial models that he runs on his laptop for 2 hours a day.
I want to invite ...
- 143
2
votes
0
answers
157
views
are page tables under utilized in x86 systems
I was recently looking at the page table architecture in x86 and x86-32 machines.
x86-32 paging architecture:
x86-64 paging architecture:
In x86 for example, we use 10 bits as offset into the page ...
0
votes
0
answers
90
views
MD5 File Concatenation
dears,
can any one help me on
here is an example md5 file which contains several checksums. (between the dashes)
You will see that 6 are for files in on subdir and 2 are for files in the directory:
---...
0
votes
3
answers
8k
views
Unix: How to Exit Out of "/" directory?
I am learning some elements of the Unix environment myself. I have tried to search up this question but perhaps I am not wording it correctly. It is quite possibly a very trivial question, too, but I ...
- 101
0
votes
0
answers
148
views
How to change permissions for a file in Ubuntu?
I run the file ./schema.pg.sh with the command sudo ./schema.pg.sh in /sql directory. But the terminal throws an error:
could not change directory to "/sql": Permission denied
Script I am ...
- 11
0
votes
1
answer
50
views
Sorting the list of subnets as Integers ascending
I have a list of subnets for eg.
180.151.96.0/22
180.151.240.0/21
119.82.112.0/22
203.122.29.0/24
203.122.48.0/22
119.82.92.0/24
180.151.108.0/23
119.82.124.0/24
119.82.89.0/24
180.151.17.0/24
119.82....
- 143
9
votes
1
answer
15k
views
Troubleshooting "Connection closed by authenticating user andy 173.63.60.32 port 11706 [preauth]"
As noted in the title, I am having trouble connecting to a remote server through ssh.
I am trying to connect a Windows machine to a server running CentOS. I have been using PuTTY on the Windows ...
- 191
0
votes
1
answer
803
views
Inodes in External Disk full. Actually not
Checking inode usage:
[cold] > df -ih .
Filesystem Inodes IUsed IFree IUse% Mounted on
/dev/sdb1 59M 59M 7.9K 100% /home/doom/cold
Here we see 100% Inode usage. 59 million inodes ...
- 1
0
votes
1
answer
2k
views
simple bash script for collecting logs
I'm new with BASH scripting and I need a little help if it's possible.
Let's say there's a UNIX server from which I want to gather some simple log events (let's say .txt files). Let's say log events ...
- 1
2
votes
1
answer
233
views
Does the slave pseudoterminal use the line discipline?
According to this article:
the line discipline instance is not evoked when the TTY driver is sending user program output to PTY master
and the accompanying diagram.
However, according to a different ...
- 23
0
votes
1
answer
217
views
Removing Duplicate from File
I have two files fileA and fileb
FILEA
1.1.1.1
2.2.2.2
3.3.3.3
4.4.4.4
5.5.5.5
FILEB
4.4.4.4
2.2.2.2
Output should be
1.1.1.1
3.3.3.3
5.5.5.5
Size of File A is around 60GB and Size of File B is 1GB
...
- 143
1
vote
3
answers
3k
views
UNIX/Linux: What's the file permission number?
When I ask for file permissions on a Windows-10 WSL Ubuntu app, I do:
ls -ltra
And I get information like:
-rwxrwxrwx 1 scampsd scampsd 42034 Mar 29 15:26 Filename.cs
drwxrwxrwx 1 scampsd scampsd ...
- 2,281
0
votes
1
answer
391
views
How to compress the main folder which includes certain sub folder using tar
Assume we have a folder structure as below
main_folder
- sub_folder1
- sub_folder2
- sub_folder3
- valid_folder1
- valid_folder2
- junk_folder1
- junk_folder2
...
- 123
1
vote
1
answer
2k
views
How to forward a remote UNIX_AF socket to a local port with ssh
I'm trying to forward a remote UNIX_AF socket to a local port through ssh, but it fails with the message:
Warning: remote port forwarding failed for listen path /path/to/sock
I tried to run ssh user@...
- 23
0
votes
1
answer
2k
views
Change the ownership of all files & folders based on search result
I know how to find all the files & folders owned by a specific user, say tommy:
find / -user tommy
But how can I chown the files & folders to another user, say peter?
I know I can change ...
- 1,090
0
votes
0
answers
1k
views
How can directories have only 1 hard link?
When doing ls -al, the second column (just after the permissions) is the number of hard links. For files, I find this clear. My problem is with directories.
I read that it is not possible to create ...
- 1