You may select the columns shown by the ‘top’ command with the ‘f’ key. Just run top and press ‘f’. Columns marked with * are shown, others are not.
In some versions of ‘top’ you have to select the [un]displayed item with arrows and activate/deactivate them with ‘d’ or space.
Imagine that we have 3 trunks for dial out and we must balance outgoing calls in random order. This could be done with the RAND function. Module func_rand.so must be compiled and loaded.
sip.conf:
[trunk1](trunk_preset) host=10.10.10.11 [trunk2](trunk_preset) host=10.10.10.12 [trunk3](trunk_preset) host=10.10.10.13
extensions.conf:
exten => _79XXXXXXXXX,1,NoCDR()
same => n,Dial(SIP/trunk${RAND(1,3)}/${EXTEN})
same => n(hang),Hangup()
You may say – well, OK, but what if my trunks are named not like [trunk1], [trunk2], [trunkN] and I can not substitute the last symbol in Dial application?
In this case we can write a list of trunk names (which you configured already in sip.conf) in txt file, for example rrtrunks.txt:
teliasonera-out deutschetelekom-out level3-out
Ensure that a ‘sort’ command is available in your *NIX system. Usually it’s a part of coreutils. Older versions don’t suit us, because they don’t have the ‘-R’ flag which means sort randomly. Newer versions have.
Then load func_shell.so and use it in your dialplan. It can execute a shell command and use its output in dialplan.
exten => _79XXXXXXXXX,1,NoCDR()
same => n,Dial(SIP/${SHELL(sort -R /etc/asterisk/rrtrunks.txt | head -1)}/${EXTEN},20)
same => n,Hangup()
It means that we sort randomly our list of trunks and get the first one each time.
Assuming your hostname is darkstar, add these lines to your /etc/hosts:
# fix libreoffice slow start
127.0.0.1 darkstar.(none)
Be sure that your hostname is the same both in /etc/hostname and in /etc/hosts .
Thanks for www.nixp.ru.
To use ‘Gosub‘ (and also ‘Return‘, ‘GosubIf‘ and ‘StackPop‘) application you must load app_stack.so .
To make calling between endpoints possible, you must load bridge_simple.so .
To originate calls from CLI you must load res_clioriginate.so (assuming app_originate.so is already loaded).
1. Log in to the remote server.
2. Type 'screen'. The virtual screen #0 will be opened. We’ll use it as a starting point for creating other screens.
3. Type 'screen -t server1'. This command will open one more virtual screen with title ‘server1’, we will use it for entering the server1, for example ‘ssh server1’.
4. Press Control-a and then ” (double inverted commas)
This command will list all your virtual screens. You may select any of them moving with up/down arrows and then pressing enter. Enter the screen #0.
5. From screen #0 we can create one more screen, for example 'screen -t server2'.
6. Jumping from one screen to some other can be done with Ctrl-a and then ” or Ctrl-a and the number of screen. In our case – 0, 1 and 2.
7. You may close any screen with Ctrl-D or 'exit', like usual.
Another scenario:
1. screen -S 1st_session_name to start screen with some session name.
2. Ctrl-a d to detach from session.
3. screen -ls to list all sessions and their pids.
4. screen -r %pid% to reconnect to a session with %pid%.
Find files older than 15 days and list them:
[root@staff /root]# find /var/squid/logs/ -mtime +15 -execdir ls -lh {} \;
-rw-r----- 1 squid squid 91k Feb 16 20:46 /var/squid/logs/cache.log.17
-rw-r----- 1 squid squid 108M Feb 17 00:00 /var/squid/logs/access.log.17
-rw-r----- 1 squid squid 122M Feb 16 00:00 /var/squid/logs/access.log.18
-rw-r----- 1 squid squid 355M Feb 19 00:00 /var/squid/logs/access.log.15
-rw-r----- 1 squid squid 137k Feb 18 23:55 /var/squid/logs/cache.log.15
-rw-r----- 1 squid squid 275M Feb 18 00:00 /var/squid/logs/access.log.16
-rw-r----- 1 squid squid 145k Feb 17 21:49 /var/squid/logs/cache.log.16
List files modified during last 5 minutes:
find /some/path/ -type f -mmin -5 -execdir ls -l {} \;
Find files bigger than 2 kilobytes in .mc/ directory:
find .mc/ -type f -size +2000c .mc/ini
or:
find .mc/ -type f -size +2k .mc/ini
Find files smaller than 80 bytes in .mc/ directory:
vn ~ # find .mc/ -type f -size -80c .mc/Tree .mc/cedit/cooledit.clip
Handy one-liner for searching a file with wildcard, case-insensitive, in 2 directories simultaneously (assuming the file contains ‘Yutong’):
srv ~ # find /storage/sounds/{cars,ru/cars} -iname yut\*
/storage/sounds/cars/Yutong.wav
/storage/sounds/ru/cars/Yutong.wav
Find files with “+380” in their name which were created on October 13, 2015 and copy them to /home/lexus/:
find /storage/cluster/ready/ -name "*+380*" -type f -newermt 2015-10-13 ! -newermt 2015-10-14 -execdir cp {} /home/lexus/ \;