Replace character X with character Y in a string with bash
I am making bash script and I want to replace one character with another character in my string variable.
Unix & Linux
How to download a file from repo, and install it later w/o internet connection?
Assuming that I want to install a program called leafpad later.
Monitoring activity on my computer.
So recently I found that someone has been using my computer without consent, browsing folders, etc….
Consecutive commands
Am I correct to assume that when ; joins two commands on a line, Bash always waits until the first command has exited before executing the second command?
And similarly, in a shell script containing two different commands on different lines, Bash always waits until the command on the first line has exited before executing the command on the second line?
Why can’t I kill a SIGSTOP’d process with a SIGTERM, and where is the pending signal stored?
I am using Debian stretch (systemd).
I was running the rsyslog daemon in foreground using
/usr/sbin/rsyslogd -n
and I did a Ctrl+Z to stop it.
The state of the process changed to Tl (stopped, threaded).
I issued multiple kill -15 <pid> commands to the process, and the state of the process was the same: Tl. Once I did an fg, it died. I have 3 questions.
How can I send attachment with ssmtp in Linux?
I can send email from my gmail account by ssmtp in Linux now. But how can I attach files to the email?
CronJob every 25 minutes
I want to know whether there is any easier way to run a job every 25 minutes. In cronjob, if you specify the minute parameter as */25, it’ll run only on 25th and 50th minute of every hour
How to debug a suspend problem?
I used to have Fedora 14 installed on this HP Compaq 610, and the suspend feature worked fine. Now that I’ve installed Scientific Linux 6.1 suspend doesn’t work anymore. How do I debug/fix it?
How can I get xrandr to detect both nvidia cards: 2 x GTX480, triple-head?
In the terminal, run these commands:
Can ‘nix handle NTFS ADS data streams?
Two-three years ago, I experimented (in Windows) with NTFS ADS meta-data (Alternate Data Streams). It seemed like an interesting idea, but it is certainly not “portable”.