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1500 questions
182
votes
3 answers
Finding all large files in the root filesystem
I have a linux server, which currently has below space usage:
/dev/sda3 20G 15G 4.2G 78% /
/dev/sda6 68G 42G 23G 65% /u01
/dev/sda2 30G 7.4G 21G 27% /opt
/dev/sda1 99M 19M 76M 20%…
Abhishek dot py
- 2,373
182
votes
5 answers
How to get only files created after a date with ls?
With the ls command, is it possible to show only the files created after a specific date, hour...?
I'm asking it because I have a directory with thousand of files.
I want so see all files that were created since yesterday.
I use ls -ltr but I have…
Luc M
- 4,095
- 5
- 30
- 29
181
votes
1 answer
How to clean log file?
Is there a better way to clean the log file? I usually delete the old logfile and create a new logfile and I am looking for a shorter type/bash/command program. How can I use an alias?
Micromega
- 4,211
181
votes
8 answers
Get SSH server key fingerprint
Is there a way to programmatically obtain a SSH server key fingerprint without authenticating to it?
I'm trying ssh -v user@host false 2>&1 | grep "Server host key", but this hangs waiting for a password if key based auth is not setup.
loopbackbee
- 4,602
180
votes
4 answers
What does ampersand mean at the end of a shell script line?
sh sys-snap.sh &
What is sh?
What is sys-snap.sh?
Why I should put & at the end of the line?
Can anyone explain the syntax?
Without the & the script won't go back to the prompt till I press Ctrl+C.
With & I can press enter and it works.
user4951
- 10,519
180
votes
8 answers
Can I "export" functions in bash?
source some_file
some_file:
doit ()
{
echo doit $1
}
export TEST=true
If I source some_file the function "doit" and the variable TEST are available on the command line. But running this script:
script.sh:
#/bin/sh
echo $TEST
doit test2
Will…
Nils
- 18,492
180
votes
6 answers
How to make a machine accessible from the LAN using its hostname
Here are details of the machine I want to access using its hostname:
$ hostname
hostname
$ cat /etc/hosts
127.0.0.1 localhost
127.0.1.1 hostname.company.local hostname
It's a default Debian 6 (Squeeze) install, so I didn't fiddle with anything…
tshepang
- 65,642
180
votes
2 answers
What is the Fedora equivalent of the Debian build-essential package?
What is the Fedora equivalent of the Debian build-essential package?
Steve Burdine
- 6,289
179
votes
1 answer
When is double-quoting necessary?
The old advice used to be to double-quote any expression involving a $VARIABLE, at least if one wanted it to be interpreted by the shell as one single item, otherwise, any spaces in the content of $VARIABLE would throw off the shell.
I understand,…
kjo
- 15,339
- 25
- 73
- 114
179
votes
3 answers
How to redirect output to a file from within cron?
I have a backup script which I need to run at a particular time of a day so I am using cron for this task and from within cron am also trying to redirect the output of backup script to a logfile.
crontab -e
*/1 * * * * /home/ranveer/backup.sh &>>…
RanRag
- 5,875
179
votes
1 answer
What is the difference between modify and change in stat command context?
The stat command's manual page says:
%x Time of last access
%y Time of last modification
%z Time of last change
I cannot understand the difference between modify and change. I understand the words are synonyms (English is not…
Andrew-Dufresne
- 5,783
179
votes
1 answer
How to apt-delete-repository?
I would like to run the reverse of this command to remove the non-compatible repository in Debian 8.1
sudo add-apt-repository -y ppa:nemh/systemback
where the command add-apt-repository is in the package software-properties-common.
I could not…
Léo Léopold Hertz 준영
- 6,928
179
votes
1 answer
Executing chdir before starting systemd service
Question: Can I kick off a process with systemd and assign that process a working directory of my choosing?
I have a service that I want to start with systemd. When that service is being started, I want to be able to assign it a current working…
Mario
- 1,985
179
votes
9 answers
How to find out the dynamic libraries executables loads when run?
I want to find out the list of dynamic libraries a binary loads when run (With their full paths). I am using CentOS 6.0. How to do this?
nakiya
178
votes
7 answers
How to run a program in a clean environment in bash?
I want to run a program in an empty environment (i.e. with no envariables set). How to do this in bash?
Eugene Yarmash
- 15,095