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Insert a line at specific line number with sed or awk
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sed -e '8iProject_Name=sowstest' -i start using GNU sed
Sample run:
[root@node23 ~]# for ((i=1; i<=10; i++)); do echo "Line #$i"; done > a_file
[root@node23 ~]# cat a_file
Line #1
Line #2
Line #3
Line #4
Line #5
Line #6
Line #7
Line #8
Line #9
Line #10
[root@node23 ~]# sed -e '3ixxx inse...
How to read a single character from the user?
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Tested on Win10 + Python 3.5： ERROR:root:'in <string>' requires string as left operand, not bytes Traceback (most recent call last): File "..\main.py", line 184, in wrapper result = func(*args, **kwargs) File "C:\GitHub\Python-Demo\demo\day_hello....
NodeJS require a global module/package
...ively instead of a static path, i.e. if you are using NVM: NODE_PATH=$(npm root -g)
– holmberd
May 30 '19 at 14:05
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Add primary key to existing table
...primary key for sql table.
First, you have to drop your old primary key.
MySQL:
ALTER TABLE Persion
DROP PRIMARY KEY;
SQL Server / Oracle / MS Access:
ALTER TABLE Persion
DROP CONSTRAINT 'constraint name';
You have to find the constraint name in your table. If you had
given constraint n...
How to specify in crontab by what user to run script? [closed]
I have few crontab jobs that run under root, but that gives me some problems. For example all folders created in process of that cron job are under user root and group root.
How can i make it to run under user www-data and group www-data so when i run scripts from my website i can manipulate those ...
gdb fails with “Unable to find Mach task port for process-id” error
...nks. This plus code signing were required to get gdb to work. I gave gdb root access (as described here stackoverflow.com/questions/10476154/…) so I didn't have to type sudo each time. Edit - Found a better approach here: stackoverflow.com/a/10441587/305149
– Aneil Mallava...
How can I create an error 404 in PHP?
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try putting
ErrorDocument 404 /(root directory)/(error file)
in .htaccess file.
Do this for any error but substitute 404 for your error.
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In Docker, what's the difference between a container and an image? [duplicate]
...o give us an interactive bash shell.
$ docker run -i -t ubuntu /bin/bash
root@48cff2e9be75:/# ls
bin boot dev etc home lib lib64 media mnt opt proc root run sbin srv sys tmp usr var
root@48cff2e9be75:/# cat > foo
This is a really important file!!!!
root@48cff2e9be75:/# exit
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Using .gitignore to ignore everything but specific directories
...pository. You just don't.
#
# Solution: stick this file up your repository root (which it assumes is
# also the WordPress root directory) and add exceptions for any plugins,
# themes, and other directories that should be under version control.
#
# See the comments below for more info on how to add e...
How to join components of a path when you are constructing a URL in Python
... begins with a slash which signifies that it already begins at the website root.
On Python 2, you have to do
from urlparse import urljoin
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