I have a file with 7000 lines. I need to combine the lines 100 at a time to reduce it to 70 lines i.e
line 1
line 2
line 3
...
line 7000
becomes
line 1 line 2 line 3 line 4 ... line 100
line 101 line 102 line 103 line 104 ... line 200
...
line 6901 line 6902 line 6903 line 6904 ... line 7000
I know I can do this using code. Is there a way to do this on command line?
I followed these instructions and found that my glibc version was 2.15-0ubuntu10.9. How do I update it to 2.15-0ubuntu10.10?
It is also mentioned here that services have to be restarted after the update. How do I know which services I have to restart?
I recently found out about ionice. If I run a script which in turn runs processes will the priorities of the child processes be equal to the parent script? If not, is there a way to set priorities for the child processes together?
UPDATE
Niceness does propagate as answered on unix.se. Does the I/O priority do too?
I was in the middle of upgrading from 12.04 to 14.04 when my internet service went down. The upgrade aborted. On switching to another network and trying sudo do-release-upgrade -d, I get the following output and error:
Checking for a new Ubuntu release
Get:1 Upgrade tool signature [198 B]
Get:2 Upgrade tool [1,148 kB]
Fetched 1,148 kB in 0s (0 B/s)
authenticate 'trusty.tar.gz' against 'trusty.tar.gz.gpg'
exception from gpg: GnuPG exited non-zero, with code 1
Debug information:
gpg: Signature made Sat 12 Apr 2014 11:55:14 PM EAT using DSA key ID ********
gpg: /tmp/update-manager-QyUNc1/trustdb.gpg: trustdb created
gpg: BAD signature from "Ubuntu Archive Automatic Signing Key <[email protected]>"
Authentication failed
Authenticating the upgrade failed. There may be a problem with the network or with the server.
What is causing this and how can I fix it?
I'm using a cron job to backup a folder to another computer. I'm not sure whether or not it succeeded and /var/log/rsync.log is only showing errors, all of which occured before the scheduled backup. There is a record of the backup job being run in /var/log/syslog.
Is there a way of checking when the folder was last synced or is another way of telling whether the sync succeeded?
I have a Lenovo y400. Whenever I unplug the laptop, the battery meter shows 0:06 or less and the Laptop battery critically low message pops up. It hibernates once in a while, the rest of the time it increases gradually and shows the correct time after about a minute. How can I fix this?
Whenever I try to resize the Scratch window, it turns black as below and slowly reduces in width until it's a line on the screen.
If I try to maximise the window, it also turns black but the width doesn't reduce. However, when I minimize/unmaximize it, it behaves as when I try to resize it.
I cannot close the window once this happens and have to do it from system monitor.
Anyone know the cause of this problem and how to fix it?
I have a Windows 7 partition mounted in Ubuntu. In order to access the fonts I created a link to the Windows font folder using
ln -s /path/to/your/windows/fonts/folder .fonts/windows
I then refreshed my font cache using
sudo fc-cache -fv
I only get Cambria in italics in LibreOffice. All the versions are available in gedit. Is there a way to get the regular and bold versions too?