Commands tagged su sorted by votes

Commands tagged su (8)

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Change user, assume environment, stay in current dir

I've used this a number of times troubleshooting user permissions. Instead of just 'su - user' you can throw another hyphen and stay in the original directory. Show Sample Output
This is sample output - yours may be different.
```
[root@localhost local]# pwd
/usr/local
[root@localhost local]# su -- user
[user@localhost local]$ pwd
/usr/local
[user@localhost local]$
```
13

su -- user

matthewdavis · 2009-09-28 04:23:43 8
resume other user's screen session via su, without pty error

Normally, if you su to another user from root and try to resume that other user's screen session, you will get an error like "Cannot open your terminal '/dev/pts/0' - please check." This is because the other user doesn't have permission for root's pty. You can get around this by running a "script" session as the new user, before trying to resume the screen session. Note you will have to execute each of the three commands separately, not all on the same line as shown here. Credit: I found this at http://www.hjackson.org/blog/archives/2008/11/29/cannot-open-your-terminal-dev-pts-please-check.
This is sample output - yours may be different.
3

# su - <user> ; script /dev/null ; screen -r

dmmst19 · 2011-07-04 16:26:10 8
Export a postgresql query into csv file

This command will "su" the execution of the command to the postgres user(implies that you are already logger as root), and export the result of the query to a file on the csv format. You'll need to adequate the fields and database information to one of your choice/need. Show Sample Output
This is sample output - yours may be different.
```
head -3 /tmp/mails.csv

2012-09-24 10:00:11.470321,sender@domainsender.com,"dest1@domain.com, dest2@domain.com",Alert:one host is down
2012-09-24 10:45:10.920158,sender@domainsender.com,"dest1@domain.com, dest2@domain.com",Alert:three hosts are down
2012-09-24 10:50:03.736794,sender@domainsender.com,"dest1@domain.com, dest2@domain.com",Alert:one host is down
```
0

# su -c "psql -d maillog -c \"copy (select date,sender,destination,subject from maillog where destination like '%domain.com%') to '/tmp/mails.csv' with csv;\" " postgres

Risthel · 2013-02-13 13:03:17 5
having root on server, add user's public key to his keys (no password required)
This is sample output - yours may be different.
0

ssh-copy-id -i user_public_key.pub root@host

throwaway111 · 2016-05-09 19:32:11 10
having root on server, add user's public key to his keys (no password required)

There's no need to make this complicated. The command already exist in the form of ssh-copy-id.
This is sample output - yours may be different.
0

ssh-copy-id -i user_public_key.pub <user>@<remotehost>

rdtyn · 2016-05-16 15:54:00 9
resume other user's screen session via su, without pty error

Only requires one `exit` to close session.
This is sample output - yours may be different.
0

sudo -iu {user} script -qc 'screen {screen_args}' /dev/null

vshih · 2018-02-01 23:20:10 22
sshdo, an alternative to sudo

Run program as root by SSH key forwarding instead of sudoers. Put this alias line in .bashrc or wherever you like. Alias arguments might need extra escaping. You might wonder about security. But you'd block out root login as much as possible of course. In sshd_config you put this: PermitRootLogin no Match Address 127.0.0.1 PermitRootLogin without-password
This is sample output - yours may be different.
-2

alias sshdo='ssh -q -t root@localhost -- cd $PWD \&\& sudo'

darkfader · 2010-10-20 22:33:22 9
having root on server, add user's public key to his keys (no password required)
This is sample output - yours may be different.
-2

cat user_public_key.pub | ssh root@<host> "cat | su -c 'mkdir -m 700 -p ~/.ssh && cat >> ~/.ssh/authorized_keys && chmod 600 ~/.ssh/authorized_keys' <user>"

noisy · 2016-05-09 08:48:40 14

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Find usb device in realtime

Using this command you can track a moment when usb device was attached.

Edit a file on a remote host using vim

Save your open windows to a file so they can be opened after you restart

This will save your open windows to a file (~/.windows). To start those applications: $ cat ~/.windows | while read line; do $line &; done Should work on any EWMH/NetWM compatible X Window Manager. If you use DWM or another Window Manager not using EWMH or NetWM try this: $ xwininfo -root -children | grep '^ ' | grep -v children | grep -v '' | sed -n 's/^ *$0x[0-9a-f]*$ .*/\1/p' | uniq | while read line; do xprop -id $line _NET_WM_PID | sed -n 's/.* = $[0-9]*$$/\1/p'; done | uniq -u | grep -v '^$' | while read line; do ps -o cmd= $line; done > ~/.windows

Escape forward slashes in a variable

For example $ path="/etc/apt/sources.list"; echo ${path//'/'/'\/'} will print $ \/etc\/apt\/sources.list

highlight with grep and still output file contents

list block devices

Shows all block devices in a tree with descruptions of what they are.

remove OSX resource forks ._ files

DESCRIPTION For each dir, dot_clean recursively merges all ._* files with their cor- responding native files according to the rules specified with the given arguments. By default, if there is an attribute on the native file that is also present in the ._ file, the most recent attribute will be used. If no operands are given, a usage message is output. If more than one directory is given, directories are merged in the order in which they are specified.

Separates each frame of a animated gif file to a counted file, then appends the frames together into one sheet file. Useful for making sprite sheets for games.

requires imagemagick

Redirect tar extract to another directory

The command extracting the tar contents into particular directory ...

Have subversion ignore a file pattern in a directory

If you don't want to commit files to subversion, and don't want those file to show up when doing an "svn stat", this command is what you need

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Commands tagged su (8)

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